Added proper CI

.github/workflows/deploy.yml

@@ -0,0 +1,43 @@
+name: OpenClimb Docker Deploy
+on:
+  push:
+    branches: [main]
+    paths:
+      - "sync/**"
+      - ".github/workflows/deploy.yml"
+  pull_request:
+    branches: [main]
+    paths:
+      - "sync/**"
+      - ".github/workflows/deploy.yml"
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ secrets.REPO_HOST }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.DEPLOY_TOKEN }}
+
+      - name: Build and push sync-server
+        uses: docker/build-push-action@v4
+        with:
+          context: ./sync
+          file: ./sync/Dockerfile
+          platforms: linux/amd64
+          push: true
+          tags: |
+            ${{ secrets.REPO_HOST }}/${{ github.repository_owner }}/openclimb-sync-server:${{ github.sha }}
+            ${{ secrets.REPO_HOST }}/${{ github.repository_owner }}/openclimb-sync-server:latest