document how to handle container OOM

[micheleAlberto]

Issue number of the reported bug or feature request: #598

Describe your changes
This adds some documentation about how to run memray in containers that get out of memory

Testing performed
I tested the scripted solution locally (but not in a container)

this is how the docs render

[godlygeek]

@micheleAlberto Would you mind updating your commit to include a Signed-off-by? See https://github.com/bloomberg/memray/blob/main/CONTRIBUTING.md#contribution-licensing - you should just be able to do a git commit --amend -s -C HEAD and then a git push --force-with-lease to add that.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.74%. Comparing base (41248ed) to head (96228d5).
Report is 55 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #605      +/-   ##
==========================================
+ Coverage   92.55%   92.74%   +0.19%     
==========================================
  Files          91       92       +1     
  Lines       11304    11234      -70     
  Branches     1581     2055     +474     
==========================================
- Hits        10462    10419      -43     
+ Misses        837      815      -22     
+ Partials        5        0       -5     

Flag	Coverage Δ
cpp	92.74% <ø> (+6.80%)	⬆️
python_and_cython	92.74% <ø> (-2.98%)	⬇️

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[godlygeek]

I did some rewording and fleshed some ideas out, but kept your general structure. Thanks so much for the contribution!