build_image.md

Build Docker image

docker build -t {tag name} -f {DockerFile} {location_of_DockerFile}
docker build -t sample -f DockerFile .

Copy Files from local/host while build

FROM ubuntu
RUN apt install nginx
COPY /home/thirumal/git/html /var/www/html

-----Build Now-------
docker build -t custom_ngnix -f DockerFile .

Copy/Add files from INTERNET

FROM ubuntu
RUN apt install nginx
ADD https:github.com/M-thirumal/abc.zip /var/www/html/abc.zip
RUN cd /var/www/html && unzip abc.zip && mv abc/* /var/www/html/
CMD nginxctl -DFOREGROUND

-----Build Now-------
docker build -t custom_ngnix -f DockerFile .

Environment variable

ENV

Working Directory

FROM ubuntu
RUN apt install nginx
WORKDIR /var/www/html
ADD https:github.com/M-thirumal/abc.zip ./abc.zip

RUN unzip abc.zip && mv abc/* .
CMD nginxctl -DFOREGROUND

-----Build Now-------
docker build -t custom_ngnix -f DockerFile .

Metadata

Label can be used to specify metadata

FROM ubuntu
RUN apt install nginx
LABEL Maintainer=Thirumal
LABEL Vendor=ABC

Argument

ARG can be used as a build time argument

FROM ubuntu
ARG software=nginx
RUN apt install $software

------------
docker build -t custom_ngnix -f DockerFile --build-arg software = vlc .

More than one argument

FROM ubuntu
ARG software=nginx
ARG user
# Add NEW user from argument
RUN adduser $user
# Switch to the NEW user
USER $user
RUN apt install $software

------------
docker build -t custom_ngnix -f DockerFile --build-arg software = vlc .