ci: migrate backend pipeline from CircleCI to GitHub Actions

Author: Skywalker690

.circleci/config.yml

@@ -0,0 +1,57 @@
+name: Build & Push Image
+
+on:
+  push:
+    branches: [ main ]
+
+env:
+  AWS_REGION: ${{ secrets.AWS_REGION }}
+  AWS_ACCOUNT_ID: ${{ secrets.AWS_ACCOUNT_ID }}
+  ECR_REPO_NAME: ${{ secrets.ECR_REPO_NAME }}
+  IMAGE_URI: ${{ secrets.AWS_ACCOUNT_ID }}.dkr.ecr.${{ secrets.AWS_REGION }}.amazonaws.com/${{ secrets.ECR_REPO_NAME }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+
+    steps:
+      # Checkout
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      # SHA (7 chars)
+      - name: Extract short SHA
+        id: vars
+        run: echo "SHORT_SHA=${GITHUB_SHA::7}" >> $GITHUB_ENV
+
+      # AWS Login
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: ${{ env.AWS_REGION }}
+
+      # Login ECR
+      - name: Login to ECR
+        uses: aws-actions/amazon-ecr-login@v2
+
+      # Buildx
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      # Build & Push
+      - name: Build and Push
+        uses: docker/build-push-action@v5
+        with:
+          context: ./server
+          file: ./server/Dockerfile
+          push: true
+          tags: |
+            ${{ env.IMAGE_URI }}:${{ env.SHORT_SHA }}
+            ${{ env.IMAGE_URI }}:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max