Server disconnected (code: 1006) error while running noVnc

Question

I have cloned the project https://github.com/kanaka/noVNC on my server(google compute engine). Now according to the readme file, i ran the script

bash launch.sh --vnc localhost:5900

this returned the

Navigate to this URL:
    http://instance_name:6080/vnc.html?host=instance_name&port=6080

Now on my local system, I hit the URL

server_ip:6080/vnc.html

I entered the IP(googled my IP) of another system and port 5900. But it is showing server disconnected(code:1006). I didn't provided any password as I didn't gave any password to vnc server.

In console it is showing error

WebSocket connection to 'ws://192.168.1.236:5900/websockify' failed: Error during WebSocket handshake: Invalid status line

Am I missing something?