Implemented basic CI workflow

Author: nir1r7

.github/workflows/ci.yml

@@ -0,0 +1,63 @@
+name: CI
+
+on:
+    push:
+        branches: ["*"]
+    pull_request:
+        branches: ["*"]
+    
+    jobs:
+        build-and-test:
+            runs-on: ubuntu-latest
+
+            permissions:
+                contents: read
+                packages: write
+
+            steps:
+                # Get code
+                - name: Checkout repository
+                  uses: actions/checkout@v4
+
+                # Set up Python
+                - name: Set up Python
+                  uses: actions/setup-python@v5
+                  with:
+                    python-version: "3.11"
+
+                # Install dependencies
+                - name: Install dependencies
+                  run: |
+                    python -m pip install --upgrade pip
+                    pip install -r backend/requirements.txt
+
+                # Run tests
+                # - name: Run tests
+                #   run: |
+                #     pytest backend/tests/
+
+                # Log in to Github Container Registry
+                - name: Log in to GHCR
+                  if: github.ref == 'refs/heads/main'
+                  uses: docker/login-action@v3
+                  with:
+                    registry: ghcr.io
+                    username: ${{ github.actor }}
+                    password: ${{ secrets.GITHUB_TOKEN }}
+
+                # Build and push Docker image (for main only)
+                - name: Build and push Docker image
+                  if: github.ref == 'refs/heads/main'
+                  run: |
+                    IMAGE_NAME=ghcr.io/${{ github.repository_owner }}/eventrelay
+                    IMAGE_TAG=${{ github.sha }}
+
+                    docker build \
+                        -f backend/Dockerfile \
+                        -t $IMAGE_NAME:latest \
+                        -t $IMAGE_NAME:$IMAGE_TAG \
+                        backend
+
+                    docker push $IMAGE_NAME:latest
+                    docker push $IMAGE_NAME:$IMAGE_TAG
+