chore: Fix issue without traling slash. (#499)

[kesara]

If a location is defined by a prefix string that ends with the slash character, and requests are processed by one of proxy_pass, fastcgi_pass, uwsgi_pass, scgi_pass, memcached_pass, or grpc_pass, then the special processing is performed. In response to a request with URI equal to this string, but without the trailing slash, a permanent redirect with the code 301 will be returned to the requested URI with the slash appended.

http://nginx.org/en/docs/http/ngx_http_core_module.html#location

Also see: https://nginx.org/en/docs/http/ngx_http_autoindex_module.html
ngx_http_autoindex_module expects a trailing /.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.08%. Comparing base (c335d04) to head (0f15653).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #500   +/-   ##
=======================================
  Coverage   96.08%   96.08%           
=======================================
  Files         153      153           
  Lines        3293     3293           
=======================================
  Hits         3164     3164           
  Misses        129      129           

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