(feat): add middleware

[sequencerr]

diff: main...sequencerr:json-server:feature/add-middleware
credit: https://github.com/typicode/json-server/pull/1625/files#diff-b335630551682c19a781afebcf4d07bf978fb1f8ac04c6bf87428ed5106870f5

restoring readme from history: https://github.com/typicode/json-server/blob/v0/README.md?plain=1#L379-L407

json-server/README.md

Lines 379 to 407 in baf0aee

	### Add middlewares
	You can add your middlewares from the CLI using `--middlewares` option:
	```js
	// hello.js
	module.exports = (req, res, next) => {
	res.header('X-Hello', 'World')
	next()
	}
	```
	```bash
	json-server db.json --middlewares ./hello.js
	json-server db.json --middlewares ./first.js ./second.js
	```
	### CLI usage
	```
	json-server [options] <source>
	Options:
	--config, -c Path to config file [default: "json-server.json"]
	--port, -p Set port [default: 3000]
	--host, -H Set host [default: "localhost"]
	--watch, -w Watch file(s) [boolean]
	--routes, -r Path to routes file
	--middlewares, -m Paths to middleware files [array]