Context

I tried using nix-shell in the context of #4854 but could not get a usable development environment. I also tried using the .devcontainer, and it also failed to provide a usable development environment.

Currently, we have three different approaches to creating a development environment to build Coder.

1. nix-shell
2. .devcontainer
3. dogfood template

Problem

1. nix-shell and .devcontainer are practically unusable.
2. All three of the approaches do not align in terms of build tools versions.

Suggested Solution

• Fix nix-shell Contributing guide: nix-shell doesn't install all tools #4854 or remove support
• Fix .devcontainer .devcontainer in coder/coder doesn't create a working dev environment.  #7591
• Align the dogfood template with '.devcontainer' dogfood: use same/similar environment for .devcontainer and dogfood template. #5211
• Eventually, update the dogfood template to use .devcontainer for provisioning of build/dev environment. (@johnstcn suggestion) (should be possible with envbuilder)

cc: @johnstcn @ammario @kylecarbs @bpmct