[romanhn]

At the risk of sounding like a broken record, but "use what you already know" is almost always the right answer for these types of questions (especially since I didn't see "learn new tech" on the list of priorities). This is why every answer has a totally different stack and probably won't help you all that much.

[kirso]

If the question would be phrased as, I want to get proficient and get to learn how to build a full SaaS app from scratch knowing JS/HTML/CSS, what would be the answer then?