TypeScript Bot (@typescript-bot) user test this

I think this is the docker one? Maybe?

Heya Jake Bailey (@jakebailey), I've started to run the diff-based user code test suite on this PR at 01969f8. You can monitor the build here.

Update: The results are in!

Jake Bailey (@jakebailey) Here are the results of running the user test suite comparing main and refs/pull/51446/merge:

Everything looks good!

TypeScript Bot (@typescript-bot) user test this slower

Heya Jake Bailey (@jakebailey), I've started to run the community code test suite on this PR at 01969f8. You can monitor the build here.

TypeScript Bot (@typescript-bot) user test this slower

Heya Jake Bailey (@jakebailey), I've started to run the community code test suite on this PR at 01969f8. You can monitor the build here.

The long user task appears to be broken, but that seems to be unrelated to this PR. I can confirm from the logs that the docker stuff works as expected: https://typescript.visualstudio.com/TypeScript/_build/results?buildId=139770&view=logs&j=fd490c07-0b22-5182-fac9-6d67fe1e939b&t=7cc137c2-61f2-5d65-b5f8-0e03d1af3170&l=1057

#2 [internal] load .dockerignore
#2 sha256:4a4ed123b7937fef327b6f12d7babeb7c7a07d5a8af63a162e6f811bf52948b2
#2 transferring context: 2B done
#2 DONE 0.0s

#1 [internal] load build definition from Dockerfile
#1 sha256:e6e25f4c61172b287941e50a438f9a94a99c43b98323adec666262af669c5696
#1 transferring dockerfile: 932B 0.0s done
#1 DONE 0.1s

#4 [auth] library/node:pull token for registry-1.docker.io
#4 sha256:9d889029f2fe9cc4ecee8c32e4b6949103b3aa1f0c32d07372b8410ce7579e3e
#4 DONE 0.0s

#3 [internal] load metadata for docker.io/library/node:current
#3 sha256:a8f9e90e756db67758be7de595ae6d22761b7409621f0db40bca2c65d7f7f599
#3 DONE 0.3s

This is buildkit output, and it's finding the new paths for the dockerignore and Dockerfile correctly, so this change looks to be safe.