Allow enabling Go Pprof

[mariomac]

If the profile.port argument is set to something different than 0, it will add a pprof endpoint so we can inspect what's going on FLP in terms of memory and CPU.

[codecov-commenter]

Codecov Report

Merging #308 (1bf6822) into main (ef4a155) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #308      +/-   ##
==========================================
- Coverage   68.67%   68.57%   -0.11%     
==========================================
  Files          81       81              
  Lines        4699     4706       +7     
==========================================
  Hits         3227     3227              
- Misses       1276     1283       +7     
  Partials      196      196              

Flag	Coverage Δ
unittests	68.57% <0.00%> (-0.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/flowlogs-pipeline/main.go	0.00% <0.00%> (ø)
pkg/config/config.go	63.63% <ø> (ø)

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[jotak]

Thanks Mario,
Can you document how to use it? (or link to external doc)

[jotak]

/lgtm
but a short documentation on how to use it would be nice

[mariomac]

@jotak I'll add the actual documentation in the NOO repo, as a new PR.