ci: Convert from CircleCI to GH actions (#12)

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: Build and run
+on:
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    - cron:  '0 9 * * *'
+  push:
+    branches: [ main, 'feat/**' ]
+    paths-ignore:
+      - '**.md' # Do not need to run CI for markdown changes.
+  pull_request:
+    branches: [ main, 'feat/**' ]
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  build-and-run:
+    runs-on: ubuntu-latest
+
+    permissions:
+      id-token: write # Needed if using OIDC to get release secrets.
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.21
+
+      - name: Build
+        run: |
+          go mod tidy
+          go build -o hello-app .
+
+      - uses: launchdarkly/gh-actions/actions/[email protected]
+        with:
+          use_server_key: true
+          role_arn: ${{ vars.AWS_ROLE_ARN }}
+          command: ./hello-app