chore: fix docker build warning

[zirain]

 1 warning found (use docker --debug to expand):
 - FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 1)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.76%. Comparing base (8713185) to head (519d39e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4389      +/-   ##
==========================================
+ Coverage   65.72%   65.76%   +0.04%     
==========================================
  Files         200      200              
  Lines       24125    24125              
==========================================
+ Hits        15855    15865      +10     
+ Misses       7137     7128       -9     
+ Partials     1133     1132       -1     

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[shawnh2]

/retest