Utilize ENTRYPOINT in Dockerfile

[bachorp]

Small quality-of-life improvement. terrashine won't have to be repeated if command/arguments are changed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.88%. Comparing base (bc66e74) to head (4da70e9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #512   +/-   ##
=======================================
  Coverage   80.88%   80.88%           
=======================================
  Files          17       17           
  Lines        1245     1245           
=======================================
  Hits         1007     1007           
  Misses        238      238           

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