More metadata in the Dockerfile.

.github/workflows/docker-image.yml

@@ -35,7 +35,9 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=schedule
+            # set latest tag for main branch
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
+            type=schedule,pattern={{date 'YYYYMMDD-hhmmss' tz='Europe/Berlin'}}
             type=ref,event=branch
             type=ref,event=pr
             type=semver,pattern={{version}}

Dockerfile

@@ -4,14 +4,17 @@ FROM golang:1.20.6-bookworm
 ########################################
 # METADATA
 LABEL author="Juha Ristolainen <[email protected]>"
+LABEL org.opencontainers.image.vendor="Juha Ristolainen"
+LABEL org.opencontainers.image.source="https://github.com/riussi/docker-build-image-go"
+LABEL org.opencontainers.image.description="My personal Go builder-image"
+LABEL org.opencontainers.image.licenses="Apache 2.0"
 
 ########################################
 # ARGUMENTS
 ARG USER=dev
 
 ########################################
 # ENVIRONMENT
-# GITHUB_TOKEN, GITLAB_TOKEN and GITEA_TOKEN
 ENV DEBIAN_FRONTEND "noninteractive"
 ENV HOME /home/${USER}
 ENV GOLANGCILINT_VERSION 1.53.3