Move template to template/ dir, add CI workflow, use pre-built image

.gitea/workflows/build-publish.yaml

@@ -0,0 +1,70 @@
+name: Build-Publish
+run-name: Build and publish infmap Docker image
+
+on: [push]
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    runs-on: ${{ matrix.platform }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to Gitea
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.jde.nz
+          username: DoesntMatter
+          password: ${{ secrets.DOCKER_PUSH_TOKEN }}
+
+      - name: Build
+        run: |
+          ARCH=$(uname -m)
+          docker build -t gitea.jde.nz/public/infmap:latest-${ARCH} ./app
+
+      - name: Publish
+        run: |
+          if [ "$GITHUB_REF" = "refs/heads/main" ]; then
+            ARCH=$(uname -m)
+            docker push gitea.jde.nz/public/infmap:latest-${ARCH}
+          fi
+
+  create-manifest:
+    needs: [build]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Gitea
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.jde.nz
+          username: DoesntMatter
+          password: ${{ secrets.DOCKER_PUSH_TOKEN }}
+
+      - name: Create and push manifest list
+        run: |
+          if [ "$GITHUB_REF" = "refs/heads/main" ]; then
+            docker manifest rm gitea.jde.nz/public/infmap:latest 2>/dev/null || true
+
+            docker manifest create gitea.jde.nz/public/infmap:latest \
+              --amend gitea.jde.nz/public/infmap:latest-x86_64 \
+              --amend gitea.jde.nz/public/infmap:latest-aarch64
+
+            docker manifest annotate gitea.jde.nz/public/infmap:latest \
+              gitea.jde.nz/public/infmap:latest-x86_64 --arch amd64
+
+            docker manifest annotate gitea.jde.nz/public/infmap:latest \
+              gitea.jde.nz/public/infmap:latest-aarch64 --arch arm64
+
+            docker manifest push gitea.jde.nz/public/infmap:latest
+
+            echo "Manifest list created and pushed successfully"
+          fi