A RESTful museum web service
// Start the dev server: deno run --allow-net --import-map=import_map.json --lock lock.json --cached-only src/app.ts
// Update lock file after adding a dependency: deno cache --import-map=import_map.json --lock=lock.json --lock-write src/app.ts
// Install dependencies after cloning: deno cache --import-map=import_map.json --lock lock.json --reload src/app.ts
// Test CORS: deno run --allow-net --allow-read https://deno.land/std/http/file_server.ts -p 3000 --host localhost