Fix: Simplify Gitea Actions workflow to use docker runner

.gitea/workflows/docker-build.yml

@@ -6,50 +6,26 @@ on:
       - main
     tags:
       - 'v*'
-  pull_request:
-    branches:
-      - main
-
-env:
-  REGISTRY: gitea.ext.ben.io
-  IMAGE_NAME: b3nw/plex-mcp
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Extract tag
+        id: extract
+        run: |
+          if [[ "${{ github.ref }}" == "refs/heads/main" ]]; then
+            echo "tag=latest" >> $GITHUB_OUTPUT
+          elif [[ "${{ github.ref }}" == refs/tags/* ]]; then
+            TAG=${GITHUB_REF#refs/tags/}
+            echo "tag=${TAG}" >> $GITHUB_OUTPUT
+          fi
 
-      - name: Log in to Gitea Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ secrets.REGISTRY_USERNAME }}
-          password: ${{ secrets.REGISTRY_PASSWORD }}
-
-      - name: Extract metadata (tags, labels)
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-          tags: |
-            type=ref,event=branch
-            type=ref,event=pr
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix=
-            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
-
-      - name: Build and push Docker image
-        uses: docker/build-push-action@v5
-        with:
-          context: .
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+      - name: Build and Push Docker Image
+        run: |
+          docker build -t git.local.ben.io/b3nw/plex-mcp:${{ steps.extract.outputs.tag }} .
+          docker login -u ${{ secrets.REGISTRY_USERNAME }} -p ${{ secrets.REGISTRY_PASSWORD }} git.local.ben.io
+          docker push git.local.ben.io/b3nw/plex-mcp:${{ steps.extract.outputs.tag }}