fix: custom esbuild.config.js loader

[tinchoz49]

Hey guys,

I was trying to update serverless-esbuild to the latest version but I was having issues invoking local functions with serverless invoke local -f <function> and using the custom config esbuild file feature.

custom:
   esbuild:
      config: esbuild.config.js

I was getting this error:

Error: Cannot find module '<project-path>/.esbuild/.build/esbuild.config.js'

And the thing is that only for the pre-local script monkey patching the serviceDir to the build project dir and for that change the require cannot find the esbuild.config.js

I made a simple change, cache the buildOptions.

By doing this we avoid to call the getBuildOptions twice and with the wrong configuration paths.

[floydspace]

Hey @tinchoz49 thanks for your other contribution

[github-actions]

🎉 This PR is included in version 1.48.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[tinchoz49]

thank you @floydspace for the quick release with this fix :)