So, I went through the steps in README (Do we really need node/npm? I feel overwhelmed) and executed the application. When I access it in the browser css and js files aren't loaded.
[debug] ** (Phoenix.Router.NoRouteError) no route found for GET /css/app.css (KolabChat.Router)
(kolab_chat) web/router.ex:1: KolabChat.Router.match_route/4
(kolab_chat) web/router.ex:1: KolabChat.Router.do_call/2
(kolab_chat) lib/kolab_chat/endpoint.ex:1: KolabChat.Endpoint.phoenix_pipeline/1
(kolab_chat) lib/plug/debugger.ex:123: KolabChat.Endpoint."call (overridable 3)"/2
(kolab_chat) lib/kolab_chat/endpoint.ex:1: KolabChat.Endpoint.call/2
(plug) lib/plug/adapters/cowboy/handler.ex:15: Plug.Adapters.Cowboy.Handler.upgrade/4
(cowboy) src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4
[debug] ** (Phoenix.Router.NoRouteError) no route found for GET /js/app.js (KolabChat.Router)
(kolab_chat) web/router.ex:1: KolabChat.Router.match_route/4
(kolab_chat) web/router.ex:1: KolabChat.Router.do_call/2
(kolab_chat) lib/kolab_chat/endpoint.ex:1: KolabChat.Endpoint.phoenix_pipeline/1
(kolab_chat) lib/plug/debugger.ex:123: KolabChat.Endpoint."call (overridable 3)"/2
(kolab_chat) lib/kolab_chat/endpoint.ex:1: KolabChat.Endpoint.call/2
(plug) lib/plug/adapters/cowboy/handler.ex:15: Plug.Adapters.Cowboy.Handler.upgrade/4
(cowboy) src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4
[debug] ** (Phoenix.Router.NoRouteError) no route found for GET /favicon.ico (KolabChat.Router)
(kolab_chat) web/router.ex:1: KolabChat.Router.match_route/4
(kolab_chat) web/router.ex:1: KolabChat.Router.do_call/2
(kolab_chat) lib/kolab_chat/endpoint.ex:1: KolabChat.Endpoint.phoenix_pipeline/1
(kolab_chat) lib/plug/debugger.ex:123: KolabChat.Endpoint."call (overridable 3)"/2
(kolab_chat) lib/kolab_chat/endpoint.ex:1: KolabChat.Endpoint.call/2
(plug) lib/plug/adapters/cowboy/handler.ex:15: Plug.Adapters.Cowboy.Handler.upgrade/4
(cowboy) src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4