issues/381: Try and prevent path traversal attacks

[komuw]

• Fixes: should we do anything about path traversal issues? #381

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.14% 🎉

Comparison is base (57591f9) 73.28% compared to head (0a0cc4c) 73.42%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #382      +/-   ##
==========================================
+ Coverage   73.28%   73.42%   +0.14%     
==========================================
  Files          47       48       +1     
  Lines        5604     5619      +15     
==========================================
+ Hits         4107     4126      +19     
+ Misses       1204     1201       -3     
+ Partials      293      292       -1     

Files Changed	Coverage Δ
middleware/middleware.go	100.00% <100.00%> (ø)
middleware/traversal.go	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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