Empty variables in the devcontainer definitions

[zaadeh]

• VS Code Version: 1.79.1
• Local OS Version: Windows 10, WSL2
• Local chip architecture: x86
• Reproduces in: Remote - Containers

Steps to Reproduce:

1. I need to mount local ssh keys from ~/.ssh into the devcontainer using this mount option:
   "mounts": [
   "source=${localEnv:HOME}${localEnv:USERPROFILE}/.ssh,target=/home/vscode/.ssh,type=bind"
   ]
   I need this to be able to push and pull changes from Github.
2. Both of the variables ${localEnv:HOME} and ${localEnv:USERPROFILE} seem to be empty when devcontainer is activated and I can see the devcontainer output that docker command is being passed wrong mount options as a result of this and therefore the devcontainer activation fails.
3. This is true when running vscode directly from Windows or running it from WSL.