add ci

.github/workflows/main.yml

@@ -0,0 +1,46 @@
+name: Terraform CI
+
+on:
+  push:
+    branches:
+      - "*"
+  pull_request:
+    branches:
+      - "*"
+
+jobs:
+  lint:
+    strategy:
+      fail-fast: false
+      matrix:
+        terraform-version: ["3.11"]
+        os: [ubuntu-22.04, macos-latest, windows-latest]
+        path:
+          - src/tf/batch-lambda
+          - src/tf/aurora-postgres-rds
+          - src/tf/cognito-app/infrastructure
+
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout the repository to the runner
+        uses: actions/checkout@v2
+
+      - name: Setup Terraform with specified version on the runner
+        uses: hashicorp/setup-terraform@v2
+        with:
+          terraform_version: ${{ matrix.terraform-version }}
+
+      - name: Terraform init
+        working-directory: ${{ matrix.path }}
+        id: init
+        run: terraform init
+
+      - name: Terraform format
+        working-directory: ${{ matrix.path }}
+        id: fmt
+        run: terraform fmt -check
+
+      - name: Terraform validate
+        working-directory: ${{ matrix.path }}
+        id: validate
+        run: terraform validate