Empty SECRET_SSH_PRIVATE_KEY generates an empty id_rsa file

[asgorobets]

Empty SECRET_SSH_PRIVATE_KEY generates an empty id_rsa file and is causing issues with SSH authentication, I assume id_rsa is first key SSH will try to use, see command below for proof.

I believe the issue is present since 2.1 version of Docksal when this private key variable was introduced

Empty key:

fin exec cat /home/docker/.ssh/id_rsa                                                                                                                                                                  

Trying to SSH somewhere will try to use that key and ask for a passphrase (not sure why):

fin exec ssh -vvv example.com
.............
debug1: Trying private key: /home/docker/.ssh/id_rsa
Enter passphrase for key '/home/docker/.ssh/id_rsa':