frontend nginx improvement (#185)

Added websocket support for frontend->backend reverse proxy
Removed buffering from frontend->backend reverse proxy
Added python syntax in .editorconfig

.editorconfig

@@ -8,3 +8,7 @@ end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true
 spaces_around_brackets = both
+
+[*.py]
+indent_style = space
+indent_size = 4

packages/frontend/nginx/nginx.conf

@@ -11,6 +11,11 @@ server {
     resolver 127.0.0.11 valid=30s;
     set $upstream_speckle_server speckle-server;
     proxy_pass http://$upstream_speckle_server:3000;
+
+    proxy_buffering off;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
   }
 
   error_page   500 502 503 504  /50x.html;