chore(nginx): improve try_files, fix rewrites, increase file cache (#3233)

* chore(nginx): improve try_files, fix rewrites, increase file cache

* fix(nginx): autoindex rules require $uri/

* chore(nginx): remove try_files from non "human-ish" paths

* chore(nginx): metrics needs autoindex

* chore(nginx): set default $lang

* chore(nginx): log not found off

* chore(nginx): no gzip static and custom 404 only on web

* chore(nginx): 404 for api too

* chore(nginx): attempt for custom 404

* chore(nginx): custom error page

* chore(nginx): remove duplicated 404

* chore(nginx): remove redundand =

* chore(nginx): autoindex stay there!

* chore(nginx): remove try_files from /api

* chore(nginx): traffic manager route

Author: ovflowd