Adds better comments and create branch per PR

Signed-off-by: Rij, W. van (Wiard) <wiard@outlook.com>

.github/workflows/container-version.yaml

@@ -18,7 +18,9 @@ jobs:
           signoff: true
           token: ${{ secrets.GITHUB_TOKEN }}
           commit-message: 'Updates busybox SHA'
-          title: '[busybox] Updates busybox SHAs'
+          branch: update-sha-action
+          delete-branch: true
+          title: '*: Updates Prometheus BusyBox image SHAs'
           body: >
             This PR is auto-generated by 
             [create-pull-request](https://github.com/peter-evans/create-pull-request).

scripts/busybox-updater.sh

@@ -4,7 +4,7 @@
 # No need to manually run this (unless you want to force an update NOW)
 
 # Get the tags from the registry, so we can get the base manifest_digest ID
-echo "Doing first CURL request"
+echo "Doing CURL request 1 of 2: getting tags."
 CURL_TAGS=$(curl --fail --silent --show-error -H "Content-type: application/json" -H "Accept: application/json" https://quay.io/api/v1/repository/prometheus/busybox/tag/ 2>&1)
 if [ $? -ne 0 ]; then
   echo "Error: ""$CURL_TAGS"
@@ -14,15 +14,15 @@ fi
 MANIFEST_DIGEST=$(echo "${CURL_TAGS}" | jq -r '.tags[]' | jq -r -n 'first(inputs | select (.name=="latest")) | .manifest_digest ')
 
 # With this manifest_digest, we can now fetch the actual manifest, which contains the digest per platform
-echo "Doing second CURL request"
+echo "Doing CURL request 2/2: getting manifest."
 RESULT_CURL=$(curl --fail --silent --show-error -H "Content-type: application/json" -H "Accept: application/json" https://quay.io/api/v1/repository/prometheus/busybox/manifest/${MANIFEST_DIGEST} 2>&1)
 if [ $? -ne 0 ]; then
   echo "Error: ""$RESULT_CURL"
   exit 1
 fi
 
 # Output this as file
-echo "Creating result"
+echo "Creating result and writing to .busybox-versions."
 RESULT=$(echo "${RESULT_CURL}" | jq -r '.manifest_data | fromjson | .manifests[] | .platform.architecture +"="+ .digest' | sed 's/sha256://g')
 echo "# Auto generated by busybox-updater.sh. DO NOT EDIT" >./.busybox-versions
 echo "${RESULT}" >>./.busybox-versions