docker: show version via $COMMIT_SHA (and $BRANCH if not "main")

Dockerfile

@@ -70,6 +70,9 @@ LABEL org.opencontainers.image.title="free-games-claimer" \
       org.opencontainers.image.base.name="ubuntu:jammy" \
       org.opencontainers.image.version="latest"
 
+ENV COMMIT_SHA=${COMMIT_SHA}
+ENV BRANCH=${BRANCH}
+
 # Configure VNC via environment variables:
 ENV VNC_PORT 5900
 ENV NOVNC_PORT 6080

docker-entrypoint.sh

@@ -2,6 +2,9 @@
 
 set -eo pipefail # exit on error, error on any fail in pipe (not just last cmd); add -x to print each cmd; see gist bash_strict_mode.md
 
+echo "Version: https://github.com/vogler/free-games-claimer/tree/${COMMIT_SHA}"
+[ ! -z $BRANCH ] && [ $BRANCH != "main" ] && echo "Branch: ${BRANCH}"
+
 # Remove chromium profile lock.
 # When running in docker and then killing it, on the next run chromium displayed a dialog to unlock the profile which made the script time out.
 # Maybe due to changed hostname of container or due to how the docker container kills playwright - didn't check.