Forgejo does not support build cache

.forgejo/workflows/docker.yml

@@ -0,0 +1,59 @@
+on:
+  push:
+    tags:
+      - 'v*'
+
+env:
+  GHCR_NAMESPACE: sigb.us
+  PLATFORMS: linux/amd64
+  FORGEJO_USER: signaryk
+
+jobs:
+  monolith:
+    name: Monolith image
+    runs-on: docker
+    container:
+      image: ghcr.io/catthehacker/ubuntu:act-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Get release tag & build flags
+        if: github.event_name == 'release' # Only for GitHub releases
+        run: |
+          echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to sigb.us container registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.sigb.us
+          username: ${{ env.FORGEJO_USER }}
+          password: ${{ secrets.FORGEJO_TOKEN }}
+
+      - name: Build main monolith image
+        id: docker_build_monolith
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: ${{ env.PLATFORMS }}
+          push: true
+          tags: |
+            git.sigb.us/${{ env.GHCR_NAMESPACE }}/dendrite:${{ github.ref_name }}
+            git.sigb.us/${{ env.GHCR_NAMESPACE }}/dendrite:latest
+            git.sigb.us/${{ env.GHCR_NAMESPACE }}/dendrite:devel
+
+      - name: Build release monolith image
+        if: github.event_name == 'release' # Only for GitHub releases
+        id: docker_build_monolith_release
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: ${{ env.PLATFORMS }}
+          push: true
+          tags: |
+            git.sigb.us/${{ env.GHCR_NAMESPACE }}/dendrite:latest
+            git.sigb.us/${{ env.GHCR_NAMESPACE }}/dendrite:stable
+            git.sigb.us/${{ env.GHCR_NAMESPACE }}/dendrite:${{ env.RELEASE_VERSION }}

.gitignore

@@ -5,6 +5,7 @@
 
 # Allow GitHub config
 !.github
+!.forgejo
 
 # Downloads
 /.downloads