add doc for adding self-hosted runner

[wmFrank]

No description provided.

[codecov-commenter]

Codecov Report

Base: 79.69% // Head: 79.68% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (19f23df) compared to base (7dee588).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #247      +/-   ##
==========================================
- Coverage   79.69%   79.68%   -0.02%     
==========================================
  Files          95       95              
  Lines        7453     7453              
==========================================
- Hits         5940     5939       -1     
- Misses       1513     1514       +1     

Impacted Files	Coverage Δ
sample_factory/algo/learning/learner.py	87.97% <0.00%> (-0.16%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.