allow port to be specified by env variable
allow port to be specified by env variable

vgarcia692/wutmi_frontend,menthena/project-a,mydearxym/essential-react,nubstick27/idea-muscle,favorit/essential-react,suttonj/topshelf,lyuehh/essential-react,vgarcia692/wutmi_frontend,mhgbrown/typography-karaoke,jessethach/reactful-dashboard,tabakd/the-samplr,suttonj/topshelf,Jonekee/essential-react,mydearxym/essential-react,epintos/interviews,tupy/essential-react,jessethach/reactful-dashboard,hhjcz/essential-react,claudiopro/essential-react,kmdsbng/todomvc_react7,tabakd/the-samplr,deflexor/react_route_seek,nubstick27/idea-muscle,PranavRam/pfrally,pheuter/essential-react,dallonf/essential-react,deflexor/react_route_seek,dallonf/essential-react,claudiopro/essential-react,PranavRam/pfrally,kmdsbng/todomvc_react7,pheuter/essential-react,annxingyuan/chatscan,jessethach/reactful-dashboard,favorit/essential-react,epintos/interviews,lyuehh/essential-react,sizov/flip-card-game-component,menthena/project-a,hhjcz/essential-react,zoetic-community/zoetic-web,jessethach/reactful-dashboard,zoetic-community/zoetic-web,sizov/flip-card-game-component,tupy/essential-react,annxingyuan/chatscan,Jonekee/essential-react,jessethach/reactful-dashboard,mhgbrown/typography-karaoke