diff --git a/.mk/docker.mk b/.mk/docker.mk
index fe9d410c..206d11d1 100644
--- a/.mk/docker.mk
+++ b/.mk/docker.mk
@@ -1,10 +1,16 @@
 
 .PHONY: docker-setup
 
-## Setup environment variables required for docker-compose
+## Setup environment variables required for docker-compose if needed
 docker-setup:
 	@scripts/docker-setup.sh
 
+.PHONY: docker-setup-update
+
+## Update environment variables required for docker-compose
+docker-setup-update:
+	@scripts/docker-setup.sh --force-update
+
 
 .PHONY: docker-run
 
@@ -19,11 +25,27 @@ docker-run: docker-setup
 docker-stop:
 	sudo docker-compose stop
 
+.PHONY: docker-build
+
 ## Build docker images for docker-compose application
 docker-build:
 	sudo docker-compose build
 
+.PHONY: docker-rebuild
+
 ## Rebuild docker images
 docker-rebuild:
 	sudo docker-compose rm -s -f
 	sudo docker-compose build
+
+.PHONY: docker-update
+
+## Update docker images (rebuild local or pull latest from repository depending on configuration).
+docker-update:
+	@scripts/docker-update.sh
+
+.PHONY: docker-purge
+
+## Shut-down docker-compose application and remove all its images and volumes.
+docker-purge:
+	sudo docker-compose down --rmi all -v --remove-orphans --timeout 0
diff --git a/Makefile b/Makefile
index 6e2f4ac3..db117b00 100644
--- a/Makefile
+++ b/Makefile
@@ -18,12 +18,28 @@ stop: docker-stop
 
 .PHONY: setup
 
-## Setup docker-compose application (generate .env file)
+## Setup docker-compose application (generate .env file in needed)
 setup: docker-setup
 
+.PHONY: update-setup
+
+## Update docker-compose application (regenerate .env file)
+setup-update: docker-setup-update
+
+.PHONY: rebuild
+
 ## Rebuild docker-compose images
 rebuild: docker-rebuild
 
+.PHONY: update
+
+## Update images of the docker-compose application
+update: docker-update
+
+.PHONY: purge
+
+## Remove docker-compose application and all its images and volumes.
+purge: docker-purge
 
 # Define default goal
 .DEFAULT_GOAL := help
diff --git a/docker-compose/prebuilt.cpu.yml b/docker-compose/prebuilt.cpu.yml
index 9219e194..74d35e54 100644
--- a/docker-compose/prebuilt.cpu.yml
+++ b/docker-compose/prebuilt.cpu.yml
@@ -5,5 +5,5 @@ version: '2.3'
 
 services:
   dedup-app:
-    image: johnhbenetech/videodeduplication:cpu
+    image: "johnhbenetech/videodeduplication:cpu${BENETECH_MODE}"
     runtime: runc
diff --git a/docker-compose/prebuilt.yml b/docker-compose/prebuilt.yml
index 9264b8dd..9ca3abcb 100644
--- a/docker-compose/prebuilt.yml
+++ b/docker-compose/prebuilt.yml
@@ -5,4 +5,4 @@ version: '2.3'
 
 services:
   dedup-app:
-    image: johnhbenetech/videodeduplication:gpu
+    image: "johnhbenetech/videodeduplication:gpu${BENETECH_MODE}"
diff --git a/scripts/docker-run.sh b/scripts/docker-run.sh
index e0b56560..15f819f4 100755
--- a/scripts/docker-run.sh
+++ b/scripts/docker-run.sh
@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+# This script runs the docker-compose application
+# according to the configuration saved in .env file.
+
 if ! [ -f ".env" ]; then
   echo -e "\e[31mERROR\e[0m Environment file not found: $(pwd)/.env"
   echo -e "\e[31mERROR\e[0m Please run script/docker-setup.sh first."
@@ -15,11 +18,15 @@ if ! [ -d "$BENETECH_DATA_LOCATION" ] || [ -z "$BENETECH_RUNTIME" ] || [ -z "$BE
 fi
 
 if [ "$BENETECH_RUNTIME" = "GPU" ] && [ "$BENETECH_PREBUILT" = "NO" ]; then
+  set -x
   sudo docker-compose up -d
 elif [ "$BENETECH_RUNTIME" = "CPU" ] && [ "$BENETECH_PREBUILT" = "NO" ]; then
+  set -x
   sudo docker-compose -f docker-compose.yml -f docker-compose/build.cpu.yml up -d
 elif [ "$BENETECH_RUNTIME" = "GPU" ] && [ "$BENETECH_PREBUILT" = "YES" ]; then
+  set -x
   sudo docker-compose -f docker-compose.yml -f docker-compose/prebuilt.yml up -d
 elif [ "$BENETECH_RUNTIME" = "CPU" ] && [ "$BENETECH_PREBUILT" = "YES" ]; then
+  set -x
   sudo docker-compose -f docker-compose.yml -f docker-compose/prebuilt.cpu.yml up -d
 fi
diff --git a/scripts/docker-setup.sh b/scripts/docker-setup.sh
index e7880bb7..f8e7c17f 100755
--- a/scripts/docker-setup.sh
+++ b/scripts/docker-setup.sh
@@ -1,46 +1,74 @@
 #!/usr/bin/env bash
 
+read -r -d '' HELP << ENDOFHELP
+usage: ./docker-setup.sh [--help] [-f | --force-update]
+
+Generate .env file used by docker-compose tool
+and some docker-related scripts under the ./script
+directory.
+
+See also https://docs.docker.com/compose/env-file/
+ENDOFHELP
+
+FORCE_UPDATE=NO;
+
+# Read arguments
+while (( $# > 0 )); do
+  case $1 in
+    -f|--force-update)
+      FORCE_UPDATE=YES;
+      shift;
+      ;;
+    --help)
+      echo "$HELP";
+      exit 0;
+      ;;
+    *)
+      echo "Unrecognized argument: $1";
+      echo "$HELP"
+      exit 1;
+  esac
+done
+
+
+LIBS="$(realpath "$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )/lib" )"
+source "$LIBS/ask.choose.sh"
+source "$LIBS/ask.confirm.sh"
+source "$LIBS/ask.path.sh"
+
 if [ -f ".env" ]; then
   source .env
 fi
 
-# Read source data locaion
-while ! [ -d "$BENETECH_DATA_LOCATION" ]; do
+# Read source data location
+if [ "$FORCE_UPDATE" = "YES" ] || ! [ -d "$BENETECH_DATA_LOCATION" ]; then
   DIRTY=yes
-  echo -n -e "\e[36mPlease specify the root folder with your video files (use Tab for auto-complete): \e[0m"
-  read -e -r BENETECH_DATA_LOCATION
-  if ! [ -d "$BENETECH_DATA_LOCATION" ]; then
-    echo -e "\e[31mERROR\e[0m No such directory: $BENETECH_DATA_LOCATION"
-  fi
-done
+  read-dir-path BENETECH_DATA_LOCATION "Please specify the root folder with your video files (use Tab for auto-complete)"
+  echo
+fi
 
 # Choose data analysis runtime
-while [ -z "$BENETECH_RUNTIME" ]; do
+if [ "$FORCE_UPDATE" = "YES" ] || [ -z "$BENETECH_RUNTIME" ]; then
   DIRTY=yes
-  echo -n -e "\e[36mWould you like to use GPU for data analysis? [Y/n]: \e[0m"
-  read -r RUNTIME_ANSWER
-  if [ -z "$RUNTIME_ANSWER" ] || [[ "$RUNTIME_ANSWER" =~ [Yy] ]]; then
-    export BENETECH_RUNTIME=GPU
-  elif [[ "$RUNTIME_ANSWER" =~ [Nn] ]]; then
-    export BENETECH_RUNTIME=CPU
-  else
-    echo -e "\e[31mERROR\e[0m Cannot recognize answer. Please answer 'y' or 'n'"
-  fi
-done
+  tput setaf 6; echo "Would you like to use GPU for data processing?"; tput sgr0;
+  choose BENETECH_RUNTIME GPU="Use GPU for data processing." CPU="Use CPU for data processing."
+  echo
+fi
 
 # Decide whether to use prebuilt images
-while [ -z "$BENETECH_PREBUILT" ]; do
+if [ "$FORCE_UPDATE" = "YES" ] || [ -z "$BENETECH_PREBUILT" ]; then
   DIRTY=yes
-  echo -n -e "\e[36mWould you like to use pre-built images? [y/N]: \e[0m"
-  read -r PREBUILT_ANSWER
-  if [ -z "$PREBUILT_ANSWER" ] || [[ "$PREBUILT_ANSWER" =~ [Nn] ]]; then
-    export BENETECH_PREBUILT=NO
-  elif [[ "$PREBUILT_ANSWER" =~ [Yy] ]]; then
-    export BENETECH_PREBUILT=YES
-  else
-    echo -e "\e[31mERROR\e[0m Cannot recognize answer. Please answer 'y' or 'n'"
+  tput setaf 6; echo "Would you like to use pre-built Docker images?"; tput sgr0;
+  choose BENETECH_PREBUILT YES="Pull pre-built images from Docker Hub." NO="Build images locally."
+  echo
+
+  # Ask if user would like to use dev or prod images
+  if [ "$BENETECH_PREBUILT" = "YES" ]; then
+    tput setaf 6; echo "Would you like to use production Docker images?"; tput sgr0;
+    choose BENETECH_MODE ''="Use production images." '-dev'="Use dev-images."
+    echo
   fi
-done
+fi
 
 # Write data to the .env file
 if [ -n "$DIRTY" ]; then
@@ -48,7 +76,8 @@ if [ -n "$DIRTY" ]; then
     echo "BENETECH_DATA_LOCATION=$BENETECH_DATA_LOCATION"
     echo "BENETECH_RUNTIME=$BENETECH_RUNTIME"
     echo "BENETECH_PREBUILT=$BENETECH_PREBUILT"
+    echo "BENETECH_MODE=$BENETECH_MODE"
   } > .env
-
-  echo -e "\e[1mOK\e[0m Configuration is written to the $(pwd)/.env file"
+  tput setaf 2; echo -n "OK"; tput sgr0;
+  echo " Configuration is written to the $(pwd)/.env";
 fi
diff --git a/scripts/docker-update.sh b/scripts/docker-update.sh
new file mode 100755
index 00000000..a1096a2e
--- /dev/null
+++ b/scripts/docker-update.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+
+# This script updates the docker-images used by the application.
+
+if ! [ -f ".env" ]; then
+  echo -e "\e[31mERROR\e[0m Environment file not found: $(pwd)/.env"
+  echo -e "\e[31mERROR\e[0m Please run script/docker-setup.sh first."
+  exit 1
+fi
+
+source .env
+
+if ! [ -d "$BENETECH_DATA_LOCATION" ] || [ -z "$BENETECH_RUNTIME" ] || [ -z "$BENETECH_PREBUILT" ]; then
+  echo -e "\e[31mERROR\e[0m Environment file is incomplete."
+  echo -e "\e[31mERROR\e[0m Please run script/docker-setup.sh first."
+  exit 1
+fi
+
+
+if [ "$BENETECH_RUNTIME" = "GPU" ] && [ "$BENETECH_PREBUILT" = "NO" ]; then
+  set -x
+  sudo docker-compose rm -s -f
+	sudo docker-compose build
+elif [ "$BENETECH_RUNTIME" = "CPU" ] && [ "$BENETECH_PREBUILT" = "NO" ]; then
+  set -x
+  sudo docker-compose rm -s -f
+  sudo docker-compose -f docker-compose.yml -f docker-compose/build.cpu.yml build
+elif [ "$BENETECH_RUNTIME" = "GPU" ] && [ "$BENETECH_PREBUILT" = "YES" ]; then
+  set -x
+  sudo docker-compose rm -s -f
+  sudo docker-compose -f docker-compose.yml -f docker-compose/prebuilt.yml pull
+elif [ "$BENETECH_RUNTIME" = "CPU" ] && [ "$BENETECH_PREBUILT" = "YES" ]; then
+  set -x
+  sudo docker-compose rm -s -f
+  sudo docker-compose -f docker-compose.yml -f docker-compose/prebuilt.cpu.yml pull
+fi
diff --git a/scripts/lib/ask.choose.sh b/scripts/lib/ask.choose.sh
new file mode 100644
index 00000000..51b703e1
--- /dev/null
+++ b/scripts/lib/ask.choose.sh
@@ -0,0 +1,116 @@
+#!/usr/bin/env bash
+# This module provides a 'choose' function which allows
+# users to choose from a set of options using arrow keys.
+# You should source this module to make it available in
+# your script.
+# Based on: https://www.bughunter2k.de/blog/cursor-controlled-selectmenu-in-bash
+
+
+# Get choice value.
+# Args:
+#   $1: Choice in the form of value="Display text."
+function choose.option-value() {
+  local entry=$1;
+  echo "$entry" | grep -Po "^[^=]+"
+}
+
+# Get choice display text.
+# Args:
+#   $1: Choice in the form of value="Display text."
+function choose.option-text() {
+  local entry=$1;
+  echo "$entry" | grep -Po "(?<==).*$"
+}
+
+# Print choices.
+# Args:
+#   $1 (number): Index of currently selected choice.
+#   *: Any number of choices in the form of value="Display text".
+function choose.print-options() {
+  local cur=$1; shift 1;
+  local entries=( "$@" )
+  for entry in "${entries[@]}"; do
+    if [[ ${entries[$cur]} == "$entry" ]]; then
+      # Print green. See http://linuxcommand.org/lc3_adv_tput.php, "Text Effects"
+      tput setaf 2; echo ">$(choose.option-text "$entry")"; tput sgr0;
+    else
+      echo " $(choose.option-text "$entry")";
+    fi
+  done
+}
+
+# Erase printed choices.
+# Args:
+#   $1 (number): Number of choices.
+function choose.erase-options() {
+  local count=$1;
+  for _ in $(seq "$count"); do
+    # Move cursor one line up
+    # See http://linuxcommand.org/lc3_adv_tput.php, "Controlling The Cursor"
+    tput cuu1;
+  done
+  # Clear from the cursor to the end of the screen
+  # See http://linuxcommand.org/lc3_adv_tput.php, "Clearing The Screen"
+  tput ed;
+}
+
+# Ask user to select from the list of options using arrow keys.
+# Args:
+#  $1 (variable reference): Variable to write result to.
+#  *: Any number of choices in the form value="Display text"
+# Example:
+#   local MODE;
+#   choose MODE prod="Use production mode" dev="Use development mode"
+function choose() {
+  # Use function name as a var-name prefix
+  # to prevent circular name reference
+  # See https://stackoverflow.com/a/33777659
+  # See http://mywiki.wooledge.org/BashFAQ/048#line-120
+  local -n _choose_result=$1; shift 1
+  local entries=( "$@" )
+  local cur=0;
+
+  choose.print-options "$cur" "${entries[@]}"
+
+  while read -sN1 key; do
+    # Catch multi-char special key sequences
+    # See https://stackoverflow.com/a/11759139
+    read -sN1 -t 0.0001 k1
+    read -sN1 -t 0.0001 k2
+    read -sN1 -t 0.0001 k3
+    key+=${k1}${k2}${k3}
+
+    # Enter or Space was pressed
+    if [ -z "$key" ]; then
+      # shellcheck disable=SC2034
+      # Variable is passed by reference
+      _choose_result="$(choose.option-value "${entries[$cur]}")";
+      return 0;
+    fi
+
+    case "$key" in
+      # Arrow up or left: previous item:
+      $'\e[A'|$'\e0A'|$'\e[D'|$'\e0D')
+        ((cur > 0)) && ((cur--));;
+
+      # Arrow down or right: next item:
+      $'\e[B'|$'\e0B'|$'\e[C'|$'\e0C')
+        ((cur < ${#entries[@]}-1)) && ((cur++));;
+
+      # Home: first item
+      $'\e[1~'|$'\e0H'|$'\e[H')
+        cur=0;;
+
+      # End: last item
+      $'\e[4~'|$'\e0F'|$'\e[F')
+        ((cur=${#entries[@]}-1));;
+
+      # 'q' or carriage return: Quit
+      q|$'\e')
+        return 1;;
+    esac
+
+    choose.erase-options "${#entries[@]}"
+    choose.print-options "$cur" "${entries[@]}"
+  done
+}
\ No newline at end of file
diff --git a/scripts/lib/ask.confirm.sh b/scripts/lib/ask.confirm.sh
new file mode 100644
index 00000000..52f9e37f
--- /dev/null
+++ b/scripts/lib/ask.confirm.sh
@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+# This module provides a 'confirm' function which allows
+# users to confirm or reject the statement. You should
+# source this module to make it available in your script.
+
+# Ask user for confirmation and save result to the variable.
+# Args:
+#   $1 (variable reference): Variable name to save result to (YES or NO).
+#   $2 (string): Question to ask.
+#   $3 (optional YES|NO): Default answer (used on empty user input).
+function confirm() {
+  # Use function name as a var-name prefix
+  # to prevent circular name reference
+  # See https://stackoverflow.com/a/33777659
+  # See http://mywiki.wooledge.org/BashFAQ/048#line-120
+  local -n _confirm_result=$1;
+  local confirm_text=$2;
+  local default=${3:-YES}
+  local answer;
+
+  local answer_pattern;
+  if [ "$default" = "YES" ]; then
+    answer_pattern="[Y/n]";
+  else
+    answer_pattern="[y/N]";
+  fi
+
+  while true; do
+    tput setaf 6; echo -n "$confirm_text $answer_pattern: "; tput sgr0;
+    read -r answer;
+    # shellcheck disable=SC2015
+    # Disable false-positive on condition expression.
+    if [ -z "$answer" ] && [ "$default" = "YES" ] || [[ "$answer" =~ [Yy] ]]; then
+      # shellcheck disable=SC2034
+      # Variable is passed by reference
+      _confirm_result=YES;
+      return 0;
+    elif [ -z "$answer" ] && [ "$default" = "NO" ] || [[ "$answer" =~ [Nn] ]]; then
+      # shellcheck disable=SC2034
+      # Variable is passed by reference
+      _confirm_result=NO;
+      return 0;
+    else
+      tput setaf 1; echo -n "ERROR"; tput sgr0; echo ": Cannot recognize the answer '$answer'. Please answer 'y' or 'n'"
+    fi
+  done
+}
diff --git a/scripts/lib/ask.path.sh b/scripts/lib/ask.path.sh
new file mode 100644
index 00000000..915f6383
--- /dev/null
+++ b/scripts/lib/ask.path.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# This module provides a 'read-file-path' and 'read-dir-path' functions
+# to ask users for existing file and directory path correspondingly.
+# You should source this module to make it available in your script.
+
+# Ask user to provide an existing directory path.
+# Args:
+#   $1 (variable reference): Variable to write result to.
+#   $2 (string): Question to ask.
+function read-dir-path() {
+  # Use function name as a var-name prefix
+  # to prevent circular name reference
+  # See https://stackoverflow.com/a/33777659
+  # See http://mywiki.wooledge.org/BashFAQ/048#line-120
+  local -n _read_dir_path_result=$1;
+  local question=$2;
+  local answer;
+
+  while true; do
+    tput setaf 6; echo -n "$question: "; tput sgr0;
+    read -e -r answer;
+    if [ -d "$answer" ]; then
+      # shellcheck disable=SC2034
+      # Variable is passed by reference
+      _read_dir_path_result=$answer;
+      return 0;
+    else
+      tput setaf 1; echo -n "ERROR"; tput sgr0; echo ": No such directory: '$answer'"
+    fi
+  done
+}
+
+# Ask user to provide an existing file path.
+# Args:
+#   $1 (variable reference): Variable to write result to.
+#   $2 (string): Question to ask.
+function read-file-path() {
+  # Use function name as a var-name prefix
+  # to prevent circular name reference
+  # See https://stackoverflow.com/a/33777659
+  # See http://mywiki.wooledge.org/BashFAQ/048#line-120
+  local -n _read_file_path_result=$1;
+  local question=$2;
+  local answer;
+
+  while true; do
+    tput setaf 6; echo -n "$question: "; tput sgr0;
+    read -e -r answer;
+    if [ -f "$answer" ]; then
+      # shellcheck disable=SC2034
+      # Variable is passed by reference
+      _read_file_path_result=$answer;
+      return 0;
+    else
+      tput setaf 1; echo -n "ERROR"; tput sgr0; echo ": No such file: '$answer'"
+    fi
+  done
+}
diff --git a/scripts/run-tests.sh b/scripts/run-tests.sh
index 12b53be7..0a57d1a3 100644
--- a/scripts/run-tests.sh
+++ b/scripts/run-tests.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 echo "Running unit tests"
 
 python -m pytest tests/general_tests.py