fix: update readme with more relevant/updated information

[catthehacker]

hi @cplee, could you check the PR and let me know how it looks?
Making it as draft since I will be updating it today/tomorrow still, just pushing it for visibility

Fixes #623
Supersedes #616
Continuation of #367

[codecov]

Codecov Report

Merging #630 (0578440) into master (f32babb) will decrease coverage by 0.04%.
The diff coverage is n/a.

❗ Current head 0578440 differs from pull request most recent head a652df8. Consider uploading reports for the commit a652df8 to get more accurate results

@@            Coverage Diff             @@
##           master     #630      +/-   ##
==========================================
- Coverage   49.39%   49.35%   -0.05%     
==========================================
  Files          23       23              
  Lines        2318     2320       +2     
==========================================
  Hits         1145     1145              
- Misses       1046     1049       +3     
+ Partials      127      126       -1     

Impacted Files	Coverage Δ
pkg/runner/step_context.go	70.40% <0.00%> (-0.54%)	⬇️
pkg/runner/run_context.go	77.55% <0.00%> (+0.13%)	⬆️

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[catthehacker]

README or IMAGES should have more information about included software in the images.
ref: #632

[cplee]

love this ❤️