Mandate minimum requirements for ram/cpu

[hubertdeng123]

get rid of soft requirements for ram/cpu, enforce this as a hard requirement instead.
16 GB of ram, 4 CPU cores

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.01%. Comparing base (9b56d62) to head (e9fdf53).
Report is 2 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3275      +/-   ##
==========================================
+ Coverage   98.02%   99.01%   +0.98%     
==========================================
  Files           3        3              
  Lines         203      203              
==========================================
+ Hits          199      201       +2     
+ Misses          4        2       -2     

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[BYK]

Would be great to record the reasoning for this change somewhere

[lukasleitsch]

I'm using a server (Hetzner) with 16GB of RAM, but a few MB are missing. The install script fails with:

FAIL: Required minimum RAM available to Docker is 15900 MB, found 15611 MB

Would be great to decrease the limit a little bit.

[danilogco]

@joshuarli is it possible to reduce the limit? Just like @lukasleitsch, my instance hosted in AWS it's supposed to be 16GB of RAM, but it's a little below of the imposed limit. Well, I changed the file manually inside the EC2 to make it work.

[joshuarli]

Yes, sorry. Thanks for the feedback! #3290