You should come join the fun!
In order to deploy a web app in 2020, one must write his frontend using react and typescript that would transpile the code into a nicely bundled and minified javascript and css files along with thousands of your 3rd party dependency libs. Yes, you heard that right! I just counted the number of libs on the node_modules in one of my small side project and it's over 1000s. You might also wonder why the typescript code would produce css when transpiled. That's because in 2020 we no longer write stylesheet directly into a css file. That's so 90s! We write the css as javascript objects now, then let the transpiler generate css from that. Isn't that neat?!
For the backend, you can choose one of the many cool frameworks and languages. Heck, why not use 5? In 2020 the backend should be written as a collection of microservices that talk to each other over grpc. Of course you still need http or how else would your react frontend talk to your microservices? So your microservices now talks multiple protocols, which is very cool!
Now pack each of those service into a collection of docker images, then write 4000 lines of yaml files to orchestrate them on kubernetes, and you're ready to go! Now you have a glorious, scalable app with 99.999% sla that can withstand your show hn frontpage traffic thanks to kubernetes, until you eventually screw up that yaml config and the whole house of cards collapse, but that's on you because you're bad at kubernetes orchestration!
I think we're indeed in a deep trench but damn it's quite an impressive trench we got here!