String HTTP_PROXY_HOST = "http.proxy.host";

    /** The key of the configuration. e.g. 8080 */
    String HTTP_PROXY_PORT = "http.proxy.port";

    /** The key of the configuration. e.g.  */
    String HTTP_PROXY_USERNAME = "http.proxy.username";

    /** The key of the configuration. e.g.  */
    String HTTP_PROXY_PASSWORD = "http.proxy.password";

    * Add new/updated docs for [Behind a Proxy](https://fastapi.tiangolo.com/advanced/behind-a-proxy/), including how to setup a local testing proxy with Traefik and using `root_path`.