Sure thing, I don't have a formally constructed guide yet. But in brief here are the steps:

1. Install NPM, Node.JS, and MongoDB on a server (the backend). Create a new node project and initiate it. Add dependencies - bcrypt, cors (for local testing to bypass CORS), express, Mongoose (to connect to MongoDB), nginx-conf (To update and parse Nginx domain config file for LN address forwarding), Nostr-tools (for connecting to relays and sending user's a DM with their NIP-05 management password), websocket-polyfill and zebedee-nodejs (Payment processor API).

2. Once the project and above dependencies for Node.JS project are setup and updated in package,json for your project, configure MongoDB - Create a new DB, a new user, give permissions to the user to the DB with dbOwner or relevant permissions for read/write/managing Indexes. Connect to the DB using MongoDB compass to test (I like using the GUI instead of cli).

3. Create a NIP-05 registration form with fields - Name/identifier, domain selection (if you have multiple domains), public key and lightning address (for forwarding/proxy). You can use vue-qrcode.js or qrcode.js for generating a QR code for LN invoice and bech32.js library for validating the npub/hex public key.

You will need to use axios to get/post to your Node.JS API with the data from the forms as 'req' data and utilize the 'response' data from the backend to perform actions or show messages in the frontend.

4. In Node.JS (the backend) - Include the necessary dependencies to connect to MongoDB using Mongoose, 'fs' to write/read to nostr.json file, Nginx-conf to write and parse data into your domain's nginx file to add rewrite/redirection rule if you using Nginx (for Apache and others, fine some other parsers for Node.js), axios for creating POST/GET responses.

Make sure to validate all invoice amounts, generation of passwords etc in the backend. The frontend is just for viewing data, validating user input on the form and handling API responses.

There's plenty more, I can add details as you have more questions.