Strong is owned by Skyworth, which according to Wikipedia is a Chinese holding company. Just so you know. It's a safe bet that all their stuff is Chinese as well.
https://en.wikipedia.org/wiki/Skyworth
In fact, I doubt any European company produces their own routers or TV boxes anymore. I would love to be proved wrong though.
Another option to consider: https://www.freecodecamp.org/news/intro-to-backend-web-development-nodejs-express-mongodb/