docker: build locally on NAS, no registry needed

.gitea/workflows/docker-build.yml

@@ -1,39 +1,11 @@
 name: Build & Push Docker Image
 
 on:
-  push:
-    branches:
-      - main
+  workflow_dispatch:
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Setup
-        shell: sh
-        run: apk add --no-cache docker-cli bash git
-
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Login to Gitea Registry
-        run: |
-          echo "${{ secrets.REGISTRY_TOKEN }}" | \
-            docker login localhost:3001 \
-              -u "${{ secrets.REGISTRY_USER }}" \
-              --password-stdin
-
-      - name: Build Docker Image
-        run: |
-          docker build \
-            --build-arg NEXT_PUBLIC_API_URL="${{ vars.NEXT_PUBLIC_API_URL }}" \
-            --build-arg NEXT_PUBLIC_APP_URL="${{ vars.NEXT_PUBLIC_APP_URL }}" \
-            -t localhost:3001/mrdiderot/michess:latest \
-            .
-
-      - name: Push to Registry
-        run: docker push localhost:3001/mrdiderot/michess:latest
-
-      - name: Logout
-        if: always()
-        run: docker logout localhost:3001
+      - name: Info
+        run: echo "Manueller Build-Trigger. Image wird direkt auf der NAS gebaut."