Updated deployment docs

[Tronic]

• Added better nginx config with more complete instructions.
• Added a mention of hypercorn Trio mode, removed an old notice of beta support.

[codecov]

Codecov Report

Merging #1821 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1821   +/-   ##
=======================================
  Coverage   92.05%   92.05%           
=======================================
  Files          23       23           
  Lines        2342     2342           
  Branches      435      435           
=======================================
  Hits         2156     2156           
  Misses        143      143           
  Partials       43       43           

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