🧪 Fix the `hadolint` errors 🧪

[jbampton]

pre-commit now requires Docker to run the hadolint hook

Dockerfile:1 DL3007 warning: Using latest is prone to errors if the image will ever update. Pin the version explicitly to a release tag
Dockerfile:2 DL3048 style: Invalid label key.
Dockerfile:8 DL3018 warning: Pin versions in apk add. Instead of `apk add <package>` use `apk add <package>=<version>`
Dockerfile:24 SC2016 info: Expressions don't expand in single quotes, use double quotes for that.
Dockerfile:24 DL3047 info: Avoid use of wget without progress bar. Use `wget --progress=dot:giga <url>`.Or consider using `-q` or `-nv` (shorthands for `--quiet` or `--no-verbose`).
Dockerfile:28 DL3003 warning: Use WORKDIR to switch to a directory
Dockerfile:38 SC2046 warning: Quote this to prevent word splitting.
Dockerfile:40 DL3003 warning: Use WORKDIR to switch to a directory
Dockerfile:46 DL3042 warning: Avoid use of cache directory with pip. Use `pip install --no-cache-dir <package>`
Dockerfile:46 DL3013 warning: Pin versions in pip. Instead of `pip install <package>` use `pip install <package>==<version>` or `pip install --requirement <requirements file>`
Dockerfile:54 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:55 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:62 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:65 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:66 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:67 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:70 DL3025 warning: Use arguments JSON notation for CMD and ENTRYPOINT arguments

[jbampton]

Now we just need some minor clean up

% hadolint Dockerfile                                  
Dockerfile:1 DL3007 warning: Using latest is prone to errors if the image will ever update. Pin the version explicitly to a release tag
Dockerfile:8 DL3018 warning: Pin versions in apk add. Instead of `apk add <package>` use `apk add <package>=<version>`
Dockerfile:28 DL3003 warning: Use WORKDIR to switch to a directory
Dockerfile:38 SC2046 warning: Quote this to prevent word splitting.
Dockerfile:40 DL3003 warning: Use WORKDIR to switch to a directory
Dockerfile:46 DL3013 warning: Pin versions in pip. Instead of `pip install <package>` use `pip install <package>==<version>` or `pip install --requirement <requirements file>`
Dockerfile:54 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:55 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:62 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:65 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:66 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:67 DL3059 info: Multiple consecutive `RUN` instructions. Consider consolidation.
Dockerfile:70 DL3025 warning: Use arguments JSON notation for CMD and ENTRYPOINT arguments