Deployment is returning 502: BAD_GATEWAY error

I am trying to sort out what is causing the error. Here is the error from the Build Logs:

12:52:57.034 | ┌──────────────────────────────┐
-- | --
12:52:57.035 | │ built server with 2 warnings │
12:52:57.035 | └──────────────────────────────┘
12:52:57.035 | > 'images/successkid.jpg' is imported by src/routes/index.svelte, but could not be resolved – treating it as an external dependency
12:52:57.035 | > Entry module "src/server.ts" is implicitly using "default" export mode, which means for CommonJS output that its default export is assigned to "module.exports". For many tools, such CommonJS output will not be interchangeable with the original ES module. If this is intended, explicitly set "output.exports" to either "auto" or "default", otherwise you might want to consider changing the signature of "src/server.ts" to use named exports only.

I am thinking the 2nd error could be the main problem with the deploy. Here is what my server.ts file shows:

import sirv from 'sirv';
import polka from 'polka';
import compression from 'compression';
import * as sapper from '@sapper/server';

const { PORT, NODE_ENV } = process.env;
const dev = NODE_ENV === 'development';

export default polka() // You can also use Express
	.use(
		compression({ threshold: 0 }),
		sirv('static', { dev }),
		sapper.middleware()
	)
	.listen(PORT, err => {
		if (err) console.log('error', err);
	});

However, when I run vercel in the CLI I get this error:

Due to `builds` existing in your configuration file, the Build and Development Settings defined in your Project Settings will not apply.

I assume that the mentioned “configuration file” is vercel.json. Mine looks like this:

{
  "version": 2,
  "builds": [
    {
      "src": "package.json",
      "use": "vercel-sapper"
    }
  ]
}

Does anyone have guidance on how to fix the 502: BAD_GATEWAY error I am experiencing? Thank you in advance for any assistance.

[kostiato]

-node_modules
+/node_modules

unfortunately this didn’t help.

[thgh]

I think the .vercelignore blocks the upload of src/node_modules

This change could fix it:

-node_modules
+/node_modules