tigervnc, websokify, novnc and Nginx with s6-overlay in a docker image.

• VNC_GEOMETRY - VNC geometry; default: 800x600
• VNC_PASSWD - VNC password, no more than 8 chars; default: MAX8char
• USER_PASSWD - user user password. If you specify it, it will change the password for user user and add it to sudoers. NOTE: This password can get by programs so it's not safe. default: (blank)

• 5911 - tigervnc
• 9000 - Nginx
• 9001 - websockify

vncmain.sh is a file which is a placeholder for foreground process running in VNC.

You can write a Dockerfile like this:

FROM oott123/novnc:latest
COPY vncmain.sh /app/vncmain.sh

And add foreground commands in your vncmain.sh:

#!/bin/bash
# Set them to empty is NOT SECURE but avoid them display in random logs.
export VNC_PASSWD=''
export USER_PASSWD=''

xterm

Then build and run your docker image. That's it!