add gitea actions ci, push docker image to registry

workflow builds on push to main, tags with latest + calver from
package.json, pushes to git.felixfoertsch.de container registry.
docker-compose.yml now pulls from registry instead of building locally.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,8 @@
+node_modules/
+dist/
+data/
+.git/
+.gitea/
+.claude/
+.env*
+*.md

.gitea/workflows/build.yml

@@ -0,0 +1,34 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [main]
+
+env:
+  REGISTRY: git.felixfoertsch.de
+  IMAGE: felixfoertsch/netfelix-audio-fix
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to Gitea Container Registry
+        run: echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "$REGISTRY" -u "${{ github.actor }}" --password-stdin
+
+      - name: Extract version from package.json
+        id: meta
+        run: echo "version=$(jq -r .version package.json)" >> "$GITHUB_OUTPUT"
+
+      - name: Build image
+        run: |
+          docker build \
+            -t "$REGISTRY/$IMAGE:latest" \
+            -t "$REGISTRY/$IMAGE:${{ steps.meta.outputs.version }}" \
+            .
+
+      - name: Push image
+        run: |
+          docker push "$REGISTRY/$IMAGE:latest"
+          docker push "$REGISTRY/$IMAGE:${{ steps.meta.outputs.version }}"

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   netfelix-audio-fix:
-    build: .
+    image: git.felixfoertsch.de/felixfoertsch/netfelix-audio-fix:latest
     ports:
       - "3000:3000"
     volumes: