Add automated docker build

.gitea/workflows/docker-build.yml

@@ -0,0 +1,75 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Extract metadata
+        id: meta
+        run: |
+          echo "sha_short=$(echo ${{ github.sha }} | cut -c1-7)" >> $GITHUB_OUTPUT
+          echo "branch=${{ github.ref_name }}" >> $GITHUB_OUTPUT
+          echo "timestamp=$(date -u +'%Y%m%d-%H%M%S')" >> $GITHUB_OUTPUT
+
+      - name: Build Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: false
+          tags: |
+            paper-dynasty:latest
+            paper-dynasty:${{ steps.meta.outputs.sha_short }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          outputs: type=docker,dest=/tmp/paper-dynasty-image.tar
+
+      - name: Build Summary
+        run: |
+          echo "## 🐳 Docker Build Successful! ✅" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Image Tags:**" >> $GITHUB_STEP_SUMMARY
+          echo "- \`paper-dynasty:latest\`" >> $GITHUB_STEP_SUMMARY
+          echo "- \`paper-dynasty:${{ steps.meta.outputs.sha_short }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Build Details:**" >> $GITHUB_STEP_SUMMARY
+          echo "- Branch: \`${{ steps.meta.outputs.branch }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "- Commit: \`${{ github.sha }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "- Timestamp: \`${{ steps.meta.outputs.timestamp }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "_Ready to deploy to production!_" >> $GITHUB_STEP_SUMMARY
+
+      - name: Save build info
+        run: |
+          mkdir -p artifacts
+          cat > artifacts/build-info.txt <<EOF
+          Build Information
+          ==================
+          Image: paper-dynasty:${{ steps.meta.outputs.sha_short }}
+          Branch: ${{ steps.meta.outputs.branch }}
+          Commit: ${{ github.sha }}
+          Author: ${{ github.actor }}
+          Timestamp: ${{ steps.meta.outputs.timestamp }}
+          EOF
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-info
+          path: artifacts/build-info.txt
+          retention-days: 30
+