JRE container build automation

.forgejo/workflows/build-push-jre-alpine.yml

@@ -0,0 +1,39 @@
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - 'jre-alpine*.**/v**'
+    paths:
+      - 'server/buildenv-jre-alpine'
+  schedule:
+    - cron: '0 0 1-31 1-12 1'
+
+jobs:
+  build_push:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout Repository
+        uses: actions/checkout@v5
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            git.nanody.de/anonoe/jre-alpine
+          tags: |
+            type=semver,pattern={{raw}}/{{commit_date 'YYYYMMDD-HHmmss' tz='Europe/Berlin'}}
+            type=semver,pattern={{version}},match=v(\d.\d.\d)$
+            type=semver,pattern={{major}}.{{minor}},match=v(\d.\d.\d)$
+            type=semver,pattern={{major}},match=v(\d.\d.\d)$
+      -
+        name: Build and push jre-alpine
+        uses: docker/build-push-action@v6
+        with:
+          context: ./server/buildenv-jre-alpine/
+          file: ./server/buildenv-jre-alpine/Containerfile
+          push: false
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}