fix(http): handle wrong request method correctly

[iuioiua]

Previously, the file-server module handled all requests with non-GET and non-HEAD methods the same as GET and HEAD methods, when they shouldn't have. Now, such methods cause a HTTP 405 status to be served.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.45%. Comparing base (889a63d) to head (5918dbd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5643   +/-   ##
=======================================
  Coverage   96.44%   96.45%           
=======================================
  Files         468      468           
  Lines       38219    38226    +7     
  Branches     5542     5549    +7     
=======================================
+ Hits        36862    36869    +7     
  Misses       1315     1315           
  Partials       42       42           

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[kt3k]

LGTM