Webcheck Docker and Apache

[EmerikVal]

Hi,

Seems like I need your help to deploy this project on my side.
The current configuration is as below
Ubuntu
Apache2
Docker

Here is what i did
sudo docker pull lissy93/web-check
sudo docker run -p 3000:3000 lissy93/web-check

I can access webcheck by using the following url (for example):
https://mysite.com

But I would like to acces webcheck by https://mysite.com/webcheck

So I adapted the apache configuration with

proxypass /webcheck http://1.2.3.4:3000/
RewriteCond %{HTTP:Upgrade} =websocket [NC]
RewriteRule /webcheck/(.) ws://1.2.3.4:3000/$1 [P,L]
RewriteCond %{HTTP:Upgrade} !=websocket [NC]
RewriteRule /webcheck/(.) http://1.2.3.4:3000/$1 [P,L]
ProxyPassReverse /webcheck http://1.2.3.4:3000/

But it doesnt work. Always a 404 not found issue.
Do you have any clue of how to make it works regarding my configuration?
Thanks a lot!