chore(nextjs): convert next.config to CommonJS for loader compatibility

[akawolfcito]

Description

When I run the project with yarn start, I see the following error (see attached images):

Before:

After:

Convert Next.js configuration file to CommonJS for compatibility with Webpack loaders:

• Renamed next.config.js → next.config.cjs
• Replaced all ESM import/export with require()/module.exports
• Loaded environment variables via require('dotenv').config()
• Removed import.meta.url handling in favor of __dirname
• Ensured pino-pretty is installed or marked as external to avoid missing‐module errors in the client bundle

Additional Information

• I have read the contributing docs (if this is your first contribution)
• This is not a duplicate of any existing pull request

Related Issues

Your ENS/address: 0x35056CD667c163552f4e1a3c767F4B9fd3E2F49f