feat: adiciona Dockerfile e integração com CI/CD

- Adiciona Dockerfile multi-stage usando Oracle Linux 9
- Instala Oracle Instant Client via RPM
- Adiciona .dockerignore para otimizar builds
- Integra build Docker no GitHub Actions CI
- Configura push automático para GitHub Container Registry

.github/workflows/ci.yml

@@ -121,3 +121,51 @@ jobs:
           NODE_ENV: test
         continue-on-error: true
 
+  docker-build:
+    name: Docker Build
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.event_name == 'push'
+    permissions:
+      contents: read
+      packages: write
+
+    env:
+      REGISTRY: ghcr.io
+      IMAGE_NAME: ${{ github.repository }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=sha,prefix={{branch}}-
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max