build: update docker metadata via action

.github/workflows/docker-publish.yml

@@ -23,6 +23,17 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ghcr.io/${{ github.repository_owner }}/obsidian-remote
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
 
@@ -39,7 +50,9 @@ jobs:
           context: .
           #file: ./Dockerfile
           push: true # Will only build if this is not here
-          tags: ghcr.io/${{ github.repository_owner }}/obsidian-remote:latest
-          build-args: |
-            "BUILD_DATE=${{ steps.date.outputs.date }}"
-            "IMAGE_VERSION=${{ env.GITHUB_REF_NAME }}"
+          #tags: ghcr.io/${{ github.repository_owner }}/obsidian-remote:latest
+          # build-args: |
+          #   "BUILD_DATE=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.created'] }}"
+          #   "IMAGE_VERSION=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] }}"
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,14 +1,10 @@
 FROM ghcr.io/linuxserver/baseimage-rdesktop-web:focal
 
 # set version label
-ARG BUILD_DATE=unknown
-ARG IMAGE_VERSION
 ARG OBSIDIAN_VERSION=0.13.31
 
 LABEL org.opencontainers.image.authors="[email protected]"
-LABEL org.opencontainers.image.created="${BUILD_DATE}"
 LABEL org.opencontainers.image.source="https://github.com/sytone/obsidian-remote"
-LABEL org.opencontainers.image.version="${IMAGE_VERSION}"
 LABEL org.opencontainers.image.title="Container hosted Obsidian MD"
 LABEL org.opencontainers.image.description="Hosted Obsidian instance allowing access via web browser"