Allow ha commands without an interactive shell

[jleeuwes]

The ha command works if you log in through SSH and then run the command in bash, but it gives an error if invoked directly like this:

$ ssh root@hostname ha info --raw-json
Unexpected server response. Status code: 401
time="2023-02-11T14:42:33+01:00" level=error msg="Unexpected server response. Status code: 401"

This is caused by a missing SUPERVISOR_TOKEN environment variable. This variable is set in /etc/profile.d/homeassistant.sh, which is only sourced for an interactive bash session.

This PR adds a /root/.ssh/environment file containing the SUPERVISOR_TOKEN environment variable. This file is read by SSH so the environment variable is also available in a non-interactive shell. A direct invocation of ha over SSH now works:

$ ssh root@hostname ha info --raw-json
{"result": "ok", "data": {"supervisor": "REDACTED", "homeassistant": "REDACTED", "hassos": "REDACTED", "docker": "REDACTED", "hostname": "REDACTED", "operating_system": "Home Assistant OS REDACTED", "features": ["reboot", "shutdown", "services", "network", "hostname", "timedate", "os_agent", "haos", "resolved", "journal"], "machine": "generic-x86-64", "arch": "amd64", "state": "running", "supported_arch": ["amd64", "i386"], "supported": true, "channel": "stable", "logging": "info", "timezone": "Europe/REDACTED"}}