sikhness

Builder issues with stacks throwing "unable to upgrade to tcp, receive 200" error

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### Before you start please confirm the following. - [x] Yes, I've searched similar issues on [GitHub](https://github.com/portainer/portainer/issues). - [x] Yes, I've checked whether this issue is covered in the Portainer...

Would you be able to update the Base Image to support Web Authentication via the WEB_AUTHENTICATION_USERNAME and WEB_AUTHENTICATION_PASSWORD variables? Would love to be able to gain those features as stated...