Add build and deploy workflow (#217)

.github/workflows/build.yaml

@@ -0,0 +1,38 @@
+name: Build and push image
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v2
+        with:
+          role-to-assume: ${{ vars.ECR_PUSH_ROLE_ARN }}
+          aws-region: ap-northeast-2
+      - name: Login to Amazon ECR
+        id: login-ecr
+        uses: aws-actions/amazon-ecr-login@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ vars.ECR_URL }}/${{ vars.IMAGE_NAME }}:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max