Fix docker check warnings

[dereknola]

Proposed Changes

• Fix the warnings around Dockerfile syntax

Types of Changes

Internal Build

Verification

docker build . --check -f Dockerfile.local
docker build . --check -f Dockerfile.test

Testing

Linked Issues

N/A

User-Facing Change

Further Comments

I finally broke down and got annoyed enough about these useless warnings.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.22%. Comparing base (bb32254) to head (bde988b).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11474      +/-   ##
==========================================
- Coverage   47.87%   43.22%   -4.66%     
==========================================
  Files         181      181              
  Lines       18794    18794              
==========================================
- Hits         8998     8124     -874     
- Misses       8448     9470    +1022     
+ Partials     1348     1200     -148     

Flag	Coverage Δ
e2etests	35.48% <ø> (-7.56%)	⬇️
inttests	18.73% <ø> (-16.13%)	⬇️
unittests	14.26% <ø> (ø)

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