Restore production workflow for Docker builds

- Clone repository and checkout specific SHA
- Build Docker image with latest and SHA tags
- Push to Forgejo container registry
- Clean and simple workflow now that DNS is fixed

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.forgejo/workflows/docker-build.yml

@@ -10,60 +10,30 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Quick Network Test (no installs)
+      - name: Checkout repository
         run: |
-          echo "=== DNS Configuration ==="
-          cat /etc/resolv.conf || echo "Cannot read resolv.conf"
+          git clone ${{ github.server_url }}/${{ github.repository }} .
+          git checkout ${{ github.sha }}
+          ls -la
 
-          echo ""
-          echo "=== Hosts file ==="
-          cat /etc/hosts || echo "Cannot read hosts"
-
-          echo ""
-          echo "=== Can we reach the internet? ==="
-          timeout 5 wget -O- http://google.com 2>&1 | head -5 || echo "Cannot reach google.com"
-
-          echo ""
-          echo "=== Can we reach Forgejo? ==="
-          timeout 5 wget -O- https://forgejo.sivic.me 2>&1 | head -5 || echo "Cannot reach forgejo.sivic.me"
-
-          echo ""
-          echo "=== Environment ==="
-          echo "Repository: ${{ github.repository }}"
-          echo "Server URL: ${{ github.server_url }}"
-
-          echo ""
-          echo "=== Network interfaces ==="
-          cat /proc/net/dev || echo "Cannot read network devices"
-
-          echo ""
-          echo "=== Default route ==="
-          cat /proc/net/route || echo "Cannot read routing table"
-
-      - name: Test if we're online at all
+      - name: Build Docker image
         run: |
-          echo "Testing basic connectivity..."
+          docker build \
+            -t forgejo.sivic.me/${{ github.repository }}:latest \
+            -t forgejo.sivic.me/${{ github.repository }}:${{ github.sha }} \
+            .
 
-          # Try to connect to Google's DNS
-          timeout 5 bash -c 'cat < /dev/null > /dev/tcp/8.8.8.8/53' 2>&1 && echo "Can reach 8.8.8.8:53" || echo "CANNOT reach 8.8.8.8:53"
-
-          # Try to connect to Google HTTP
-          timeout 5 bash -c 'cat < /dev/null > /dev/tcp/google.com/80' 2>&1 && echo "Can reach google.com:80" || echo "CANNOT reach google.com:80"
-
-          # Try to connect to Forgejo
-          timeout 5 bash -c 'cat < /dev/null > /dev/tcp/forgejo.sivic.me/443' 2>&1 && echo "Can reach forgejo.sivic.me:443" || echo "CANNOT reach forgejo.sivic.me:443"
-
-      - name: Stop here and report
+      - name: Log in to Forgejo Container Registry
         run: |
-          echo ""
-          echo "================================================================"
-          echo "DIAGNOSIS:"
-          echo "If you cannot reach 8.8.8.8:53, your runner has NO internet access"
-          echo "This is a runner configuration issue, not a DNS issue"
-          echo ""
-          echo "Fix: Check your Forgejo runner network configuration"
-          echo "- Is the runner container using host networking?"
-          echo "- Does the host have internet access?"
-          echo "- Are there firewall rules blocking the runner?"
-          echo "================================================================"
-          exit 1
+          echo "${{ secrets.GITEA_TOKEN }}" | docker login forgejo.sivic.me -u ${{ github.actor }} --password-stdin
+
+      - name: Push Docker images
+        run: |
+          docker push forgejo.sivic.me/${{ github.repository }}:latest
+          docker push forgejo.sivic.me/${{ github.repository }}:${{ github.sha }}
+
+      - name: Summary
+        run: |
+          echo "✅ Successfully built and pushed:"
+          echo "  - forgejo.sivic.me/${{ github.repository }}:latest"
+          echo "  - forgejo.sivic.me/${{ github.repository }}:${{ github.sha }}"