moving ci/cd over to forgejo

.forgejo/workflows/docker-publish.yml

@@ -0,0 +1,59 @@
+name: Docker Build & Publish 
+
+on:
+  release:
+    types: [created]
+  workflow_dispatch:
+
+env:
+  CTR_REGISTRY: git.nickorlow.com 
+  IMAGE_NAME: "anthracite" 
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf
+
+      - name: Get Release Tag
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+
+      - name: Write Version 
+        run: |
+          echo Building with version number $RELEASE_VERSION
+          echo $RELEASE_VERSION > src/build/version.txt
+
+      - name: Log into registry ${{ env.CTR_REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          registry: ${{ env.CTR_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.CTR_REGISTRY }}/${{ env.IMAGE_NAME }}
+          
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max