Remove memory leaks

[oliveromahony]

Proposed changes

Added some contexts to different places that memory leaks were occurring

Setting PROFILE_ADDRESS environmental variable will enable pprof:
e.g. PROFILE_ADDRESS=localhost:6060 go run main.go
will run pprof on localhost:6060

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

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Name	Link
🔨 Latest commit	89ef204
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[codecov-commenter]

Codecov Report

Patch coverage: 62.26% and project coverage change: +0.06% 🎉

Comparison is base (3d9d248) 67.43% compared to head (89ef204) 67.49%.
Report is 4 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #422      +/-   ##
==========================================
+ Coverage   67.43%   67.49%   +0.06%     
==========================================
  Files         113      113              
  Lines       12764    12806      +42     
==========================================
+ Hits         8607     8644      +37     
- Misses       3588     3592       +4     
- Partials      569      570       +1     

Files Changed	Coverage Δ
src/core/network/network.go	31.48% <0.00%> (ø)
src/core/nginx.go	46.39% <0.00%> (ø)
src/core/environment.go	52.27% <71.05%> (+0.67%)	⬆️
src/core/process.go	66.66% <100.00%> (+3.70%)	⬆️

... and 9 files with indirect coverage changes

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