flyio-local-dev-loop

# Fly.io Local Dev Loop ## Overview Fast local development workflow for Fly.io apps: build and test Docker containers locally, proxy remote Fly services (Postgres, Redis) to localhost, and use `fly deploy` for integration testing. ## Instructions ### Step 1: Local Docker Testing ```bash # Build and run locally — same Dockerfile used by Fly docker build -t my-app . docker run -p 3000:3000 \ -e NODE_ENV=development \ -e DATABASE_URL="postgres://localhost:5432/dev" \ my-app # Test curl http://localhost:3000/health ``` ### Step 2: Proxy Remote Fly Services ```bash # Proxy Fly Postgres to localhost:5432 fly proxy 5432 -a my-db & # Now use local tools against remote Fly Postgres psql postgres://postgres:password@localhost:5432/mydb npx prisma studio # Prisma GUI works against proxied DB # Proxy Redis fly proxy 6379 -a my-redis & redis-cli -h localhost -p 6379 ``` ### Step 3: Development fly.toml ```toml # fly.dev.toml — dev overrides (not committed) app = "my-app-dev" primary_region = "iad" [env] NODE_ENV = "development" LOG_LEVEL = "debug" [http_service] internal_port = 3000 auto_stop_machines = "off" # Keep running for debugging min_machines_running = 1 [[vm]] cpu_kind = "shared" cpus = 1 memory = "256mb" # Smaller for dev ``` ### Step 4: Fast Deploy Cycle ```bash # Deploy to dev app fly deploy -a my-app-dev --config fly.dev.toml # Watch logs while testing fly logs -a my-app-dev --no-tail & # SSH in for debugging fly ssh console -a my-a...