change port ng serve code example

Example 1: angular ng serve with custom port

ng serve --port 4401

Example 2: angular cli change serve port

"projects": {
    "my-cool-project": {
        ... rest of project config omitted
        "architect": {
            "serve": {
                "options": {
                    "port": 1337
                }
            }
        }
    }
}