SERVER_PORT=Port where server will listen for requests

PROXY_LIST_BASE_URL = Base url where proxy list can be fetched. Proxy type(https, socks5) will be concatenated to this URL
PROXY_LIST_TIMEOUT = Wait PROXY_LIST_TIMEOUT seconds for proxy list before dropping request
PROXY_LIST_RELOAD_INTERVAL = Refresh proxy list every PROXY_LIST_RELOAD_INTERVAL minutes

MAX_PROXY_CONNECTIONS = Number of maximum parallel connections when testing proxy speed (Default 5)
URL_TO_FETCH = Url to fetch for proxy speed evaluation