Merge branch 'phoenix1.7' into 'develop'

Update to Phoenix 1.7

See merge request pleroma/pleroma!3900

config/config.exs

@@ -110,17 +110,6 @@ config :pleroma, :uri_schemes,
     "xmpp"
   ]
 
-websocket_config = [
-  path: "/websocket",
-  serializer: [
-    {Phoenix.Socket.V1.JSONSerializer, "~> 1.0.0"},
-    {Phoenix.Socket.V2.JSONSerializer, "~> 2.0.0"}
-  ],
-  timeout: 60_000,
-  transport_log: false,
-  compress: false
-]
-
 # Configures the endpoint
 config :pleroma, Pleroma.Web.Endpoint,
   url: [host: "localhost"],
@@ -130,10 +119,7 @@ config :pleroma, Pleroma.Web.Endpoint,
       {:_,
        [
          {"/api/v1/streaming", Pleroma.Web.MastodonAPI.WebsocketHandler, []},
-         {"/websocket", Phoenix.Endpoint.CowboyWebSocket,
-          {Phoenix.Transports.WebSocket,
-           {Pleroma.Web.Endpoint, Pleroma.Web.UserSocket, websocket_config}}},
-         {:_, Phoenix.Endpoint.Cowboy2Handler, {Pleroma.Web.Endpoint, []}}
+         {:_, Plug.Cowboy.Handler, {Pleroma.Web.Endpoint, []}}
        ]}
     ]
   ],