Send frontend through phoenix.

lib/pleroma/web/endpoint.ex

@@ -9,6 +9,9 @@ defmodule Pleroma.Web.Endpoint do
   # when deploying your static files in production.
   plug Plug.Static,
     at: "/media", from: "uploads", gzip: false
+  plug Plug.Static,
+    at: "/", from: :pleroma,
+    only: ~w(index.html static)
 
   # Code reloading can be explicitly enabled under the
   # :code_reloader configuration of your endpoint.

lib/pleroma/web/router.ex

@@ -70,4 +70,14 @@ def user_fetcher(username) do
     get "/host-meta", WebFinger.WebFingerController, :host_meta
     get "/webfinger", WebFinger.WebFingerController, :webfinger
   end
+
+  scope "/", Fallback do
+    get "/*path", RedirectController, :redirector
+  end
+
+end
+
+defmodule Fallback.RedirectController do
+  use Pleroma.Web, :controller
+  def redirector(conn, _params), do: send_file(conn, 200, "priv/static/index.html")
 end