In any case, Jenkins is an open source tool I've used for CI/CD, and I think most of the cloud platforms have some native support for it (e.g. in Azure DevOps you build pilelines). Using your tool of choice (or whatever your company sticks you with) just configure it to compile and/or do your linter, run unit tests, if all pass, accept the integration.

if not, barf and let the developer fix things and try again.

You might consider trying TypeScript on your JavaScript to do whatever magic it can on your JS code. This may combine with or be a lightweight alternative to a traditional jslint setup.

I haven't used it (since I write source in TS) but supposedly TS can typecheck javascript files to some extent (i.e. don't need to write TypeScript code to get some value from the TypeScript transpiler)