Is there any step-by-step explanation how to add a complete Watson conversation to any page. I only can find collections of files, which do not help. Download the json file, ok, done, and then? Create the env file with user id and password, ok, but oops, which tool opens that for me? How will all this be implemented in the page? Thanks much for any more info (hints, urls, whatever)
Why are you downloading the json file?
Are you comfortable with web page development and incorporating a REST API into the web application. If so then the conversation is just a REST API.
If this leaves you puzzled then maybe the best option for you is to go down the Node-RED route. There is a conversation starter kit, with a video introduction that should be enough to get you started - https://github.com/watson-developer-cloud/node-red-labs/tree/master/starter-kits/ok_watson.
How to analyze a question with Watson 2 Answers