Koa + SQLite + TypeScript example integration

1. Install dependencies via yarn or npm install
2. Create DB schema via npx mikro-orm schema:create -r
3. Run via yarn start or yarn start:dev (watch mode)
4. Example API is running on localhost:3000

Available routes:

GET     /author        finds all authors
GET     /author/:id    finds author by id
POST    /author        creates new author
PUT     /author/:id    updates author by id

GET     /book          finds all books
GET     /book/:id      finds book by id
POST    /book          creates new book
PUT     /book/:id      updates book by id