fix: Use proper entrypoint for Docker image build

[kylecarbs]

No description provided.

[codecov]

Codecov Report

Merging #411 (f69b331) into main (6caceac) will increase coverage by 2.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #411      +/-   ##
==========================================
+ Coverage   66.02%   68.21%   +2.19%     
==========================================
  Files          71      155      +84     
  Lines         774     9045    +8271     
  Branches       73       73              
==========================================
+ Hits          511     6170    +5659     
- Misses        249     2269    +2020     
- Partials       14      606     +592     

Flag	Coverage Δ
unittest-go-macos-latest	62.62% <ø> (?)
unittest-go-ubuntu-latest	67.42% <ø> (?)
unittest-js	66.02% <ø> (ø)

Impacted Files	Coverage Δ
httpmw/workspaceparam.go	76.47% <0.00%> (ø)
provisioner/terraform/parse.go	77.77% <0.00%> (ø)
codersdk/provisionerdaemons.go	58.46% <0.00%> (ø)
site/embed.go	83.14% <0.00%> (ø)
httpmw/apikey.go	84.34% <0.00%> (ø)
provisionersdk/agent.go	100.00% <0.00%> (ø)
cli/clitest/clitest.go	93.33% <0.00%> (ø)
provisionerd/provisionerd.go	76.65% <0.00%> (ø)
httpmw/workspaceresourceparam.go	59.18% <0.00%> (ø)
httpmw/userparam.go	76.66% <0.00%> (ø)
... and 74 more

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