ci: update build-presejpacky workflow to match validated Gitea template

.gitea/workflows/build-presejpacky.yml

@@ -1,6 +1,12 @@
 name: Build and Push Presejpacky Docker Image
 
 on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Image tag'
+        required: true
+        default: 'latest'
   push:
     branches:
       - main
@@ -12,35 +18,29 @@ on:
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Log in to Gitea Registry
-        uses: docker/login-action@v3
-        with:
-          registry: gitea.home.hrajfrisbee.cz
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Docker metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: |
-            gitea.home.hrajfrisbee.cz/${{ github.repository_owner }}/flat-stack-presejpacky
-          tags: |
-            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
-            type=match,pattern=presejpacky-v(.*),group=1
+      - name: Login to Gitea registry
+        run: echo "${{ secrets.REGISTRY_TOKEN }}" | docker login -u ${{ github.actor }} --password-stdin gitea.home.hrajfrisbee.cz
 
       - name: Build and push image
-        uses: docker/build-push-action@v6
-        with:
-          context: drills/flat-stack-presejpacky
-          file: drills/flat-stack-presejpacky/Dockerfile
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+        run: |
+          TAG=${{ github.ref_name }}
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            TAG=${{ inputs.tag }}
+          elif [ "${{ github.ref }}" = "refs/heads/main" ]; then
+            TAG="latest"
+          fi
+          IMAGE=gitea.home.hrajfrisbee.cz/${{ github.repository_owner }}/flat-stack-presejpacky:$TAG
+          docker build -f drills/flat-stack-presejpacky/Dockerfile \
+            --build-arg GIT_TAG=$TAG \
+            --build-arg GIT_COMMIT=${{ github.sha }} \
+            --build-arg BUILD_DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ) \
+            -t $IMAGE drills/flat-stack-presejpacky
+          docker push $IMAGE