Before starting the server, you must create a TLS certificate(named server.crt) and a secret key(named server.key), then place them in certs/ directory.
$ npm i
$ npm start
> json-server-sample@1.0.0 start /Users/takehiro/Documents/git/json-server-sample
> nodemon server.js
[nodemon] 1.17.2
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node server.js`
JSON Server is running on https://localhost:3000