message: Improve args docs
diff: @@ -67,32 +67,7 @@ app.log.keep((event, meta) => {
  // TODO return true if event should not be removed yet from log
  })
  -if (app.env === 'production') {
  - app.listen({ cert: 'cert.pem', key: 'key.pem' })
  -} else {
  - app.listen()
  -}
  -```
  -
  -### Use console arguments or environment variables to redefine options
  -
  -Command-line | Environment | Description
  -----|-----|------------
  --h, --host | LOGUX_HOST | Host to bind server
  --p, --port | LOGUX_PORT | Port to bind server
  --k, --key | LOGUX_KEY | Path to SSL key
  --c, --cert | LOGUX_CERT | Path to SSL certificate
  -
  -
  -Usage:
  -```sh
  -$ node server.js --help
  -Options:
  - -h, --host Host to bind server. [string]
  - -p, --port Port to bind server [number]
  - -k, --key Path to SSL key [string]
  - -c, --cert Path to SSL certificate [string]
  - --help Show help [boolean]
  +app.listen(app.loadOptions(process))
  ```
  @@ -161,3 +136,13 @@ Use your favorite DevOps tools to start Logux server in `production` mode:
  ```sh
  NODE_ENV=production npm start
  ```
  +
  +You DevOps tools could set Logux Server options via arguments
  +or environment variables:
  +
  +Command-line | Environment | Description
  +---------------|--------------|------------------------
  +`-h`, `--host` | `LOGUX_HOST` | Host to bind server
  +`-p`, `--port` | `LOGUX_PORT` | Port to bind server
  +`-k`, `--key` | `LOGUX_KEY` | Path to SSL key
  +`-c`, `--cert` | `LOGUX_CERT` | Path to SSL certificate
  