vncserver: spec creates password file

spec/vncserver_spec.py

@@ -5,6 +5,9 @@ from expects import expect, equal
 
 with description('vncserver') as self:
     with it('selects passed DE with -s'):
+        subprocess.run('echo -e "password\\npassword\\n" | vncpasswd -u docker',
+                       shell=True, text=True, executable='/bin/bash')
+
         cmd = 'vncserver :1 -select-de mate -cert /etc/ssl/certs/ssl-cert-snakeoil.pem -key /etc/ssl/private/ssl-cert-snakeoil.key -sslOnly -FrameRate=24 -interface 0.0.0.0 -httpd /usr/share/kasmvnc/www -depth 24 -geometry 1280x1050'
         try:
             completed_process = subprocess.run(cmd, shell=True, capture_output=True,