Opt: Generate random ssh username

config/deploy.template-docker.yaml

@@ -106,16 +106,16 @@ Deploy:
     # See here (http://app.azurlane.cloud/en.html) for more infomation.
     EnableRemoteAccess: false
     # Username when login into ssh server
-    # [Default] null (use username logged in your system)
+    # [Default] null (will generate a random one when startup)
     SSHUser: null
     # Server to connect
     # [Default] null
     # [Format] host:port
     SSHServer: null
     # Filepath of SSH executable `ssh.exe`
-    # [Default] null (use ssh in system PATH)
+    # [Default] ssh (find ssh in system PATH)
     # If you don't have one, install OpenSSH or download it here (https://github.com/PowerShell/Win32-OpenSSH/releases)
-    SSHExecutable: null
+    SSHExecutable: ssh
 
   Webui:
     # --host. Host to listen