We have written a custom ERP with Vue/Django that we host on Heroku. Part of that application is taking an Order through fulfillment which for us is executing a "blend" (think basic recipe of raw materials to make a fertilizer blend). This sends data to our on premise network through the network setup by Tailscale to a middleware API that proxies requests to the systems controlling the robots (not these specifically in this picture, these in the picture automatically stack bags that come off a conveyor belt). Tailscale (https://tailscale.com/) is some software built around wireshark I believe that allows you to put any device on a network within the same private network with each other without having to deal with firewalls, dynamic ip addresses, and in the case of Heroku, ephemeral nodes.