chore: add GitHub Actions CI/CD workflow

Add comprehensive GitHub Actions workflow for automated builds and Docker image publishing:
- Build and test on push/PR to main branch
- Multi-platform Docker builds (linux/amd64, linux/arm64)
- Push edge images on every commit to main
- Push versioned and latest tags on release

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: klakegg

.github/workflows/build.yml

@@ -0,0 +1,83 @@
+name: Build
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  release:
+    types: [ released ]
+
+jobs:
+  build:
+    name: Build [JVM]
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v6
+
+    - name: Setup Go
+      uses: actions/setup-go@v6
+      with:
+        go-version-file: 'go.mod'
+
+    - name: Build
+      run: make build
+
+    - name: Test
+      run: make test
+
+  docker-jvm:
+    name: Docker
+    runs-on: ubuntu-latest
+    needs:
+      - build
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v6
+
+    - name: Prepare version labels
+      uses: k15g/action-version-labels@edge
+      with:
+        prefix: project
+
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Lowercase github.repository
+      run: echo "IMAGE_NAME=`echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]'`" >>${GITHUB_ENV}
+
+    - name: Build and push [edge]
+      run: |
+        docker buildx build \
+          -t ghcr.io/${{ env.IMAGE_NAME }}:edge \
+          --platform linux/amd64,linux/arm64 \
+          --push .
+
+    - name: Build and push [version]
+      if: startsWith(github.ref, 'refs/tags/v')
+      run: |
+        docker buildx build \
+          -t ghcr.io/${{ env.IMAGE_NAME }}:${{ env.PROJECT_VERSION }} \
+          --platform linux/amd64,linux/arm64 \
+          --push .
+
+    - name: Build and push [latest]
+      if: startsWith(github.ref, 'refs/tags/v')
+      run: |
+        docker buildx build \
+          -t ghcr.io/${{ env.IMAGE_NAME }}:latest \
+          --platform linux/amd64,linux/arm64 \
+          --push .

Dockerfile

@@ -13,6 +13,7 @@ COPY . .
 # Build the application
 RUN CGO_ENABLED=0 GOOS=linux go build -o /indexer ./cmd/indexer
 
+
 # Final stage
 FROM alpine:3.23