Add GitHub Actions workflow for CI/CD

- Run tests on all PRs and pushes to main
- Deploy to Fly.io on push to main (if FLY_API_TOKEN is configured)
- Gracefully skip deploy when token is not set

Author: derrickreimer

.github/workflows/ci.yml

@@ -0,0 +1,47 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.22"
+
+      - name: Run tests
+        run: make test
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    env:
+      FLY_API_TOKEN: ${{ secrets.FLY_API_TOKEN }}
+    steps:
+      - name: Check for FLY_API_TOKEN
+        id: check-token
+        run: |
+          if [ -n "$FLY_API_TOKEN" ]; then
+            echo "has_token=true" >> $GITHUB_OUTPUT
+          else
+            echo "has_token=false" >> $GITHUB_OUTPUT
+            echo "Skipping deploy - FLY_API_TOKEN not configured"
+          fi
+
+      - uses: actions/checkout@v4
+        if: steps.check-token.outputs.has_token == 'true'
+
+      - uses: superfly/flyctl-actions/setup-flyctl@master
+        if: steps.check-token.outputs.has_token == 'true'
+
+      - name: Deploy to Fly.io
+        if: steps.check-token.outputs.has_token == 'true'
+        run: flyctl deploy --remote-only

README.md

@@ -24,6 +24,15 @@ fly deploy
 
 The app will auto-stop when idle and auto-start on incoming requests to minimize costs.
 
+### CI/CD
+
+Pushes to `main` automatically run tests and deploy to Fly.io via GitHub Actions.
+
+To enable automatic deploys, add `FLY_API_TOKEN` to your repository secrets:
+
+1. Generate a token: `fly tokens create deploy -x 999999h`
+2. Add it to GitHub: Settings → Secrets and variables → Actions → New repository secret
+
 ## Configuration
 
 ### Environment Variables