First; I am not a frontend developer whatsoever. In my newly formed small team of developers, I handle backend, cloud, and devops.

While getting automated frontend deployments to a S3 bucket, I noticed that our frontend (next 15.1.6) does not build statically (see below).
$ npx next build -d

   ▲ Next.js 15.1.6

   Creating an optimized production build ...
 ✓ Compiled successfully
   Skipping linting
 ✓ Checking validity of types    
 ✓ Collecting page data    

> Server Actions are not supported with static export.

The next build -d output does not include the snippets that make it not SSG-ready, and I have very little idea how to resolve these issues.


TL;DR
How do I refactor the codebase to make it work with SSG? are there specific functions/snippets i can grep to find errors?