Hey! Thanks for the nice and interesting comment!
I thought about using PHP, but in the companies I worked for there is this idea that PHP is inherently insecure. No matter the version, no matter if you thought about it during development. That's why I ruled it out. It would have been difficult to sell the idea to them.
JavaScript, and more specifically Typescript, is interesting for me as I'll have only one language for both front and back ends. I do also have a VSCode extension under development and it's typescript too.
I don't have enough free time to invest in different languages, so it's an obvious choice.
RE: The challenge of starting a new development project