Here: [GUIDE] Echo Speaks Server on Docker (or without)
Hubitat App Login
Open Echo Speaks App
Click button under Alexa Login Status text
Click Manage Cookie Login Status
Deselect the Use Heroku option
Select your Domain and Locale
Click Begin Server Setup and KEEP THIS POP UP OPEN
See supplemental instructions in next section to use a local callback URL
Open your server in another tab http://SERVER.IP:8091
First fill in the callback URL and Save Settings
Then log into Amazon using the button at the top and wait to be redirected back to the settings page (do NOT click Save at bottom again)
Close server login tab and the callback url popup
Go back to the Hubitat app browser window
Page should refresh and show you are logged in (otherwise press next)
If you get red error text that you still need to login:
Restart the docker container
Click the Amazon Login Page button
Log in again (do not click Save at bottom)
Close the server login tab, and the main app should refresh
You should now be logged in with no errors in the Hubitat app
EDIT : I updated the example stack file in my guide to have more instructions for Windows installs! Sorry, I was not aware leaving it on host mode would totally break it, I thought it just ignored it.