Fix: Database Pool Exhaustion Edge in Nuxt on AWS Lambda

To fix this issue, we need to configure Nuxt to properly close the database connection pool when the Lambda function is terminated. We can achieve this by adding a `close` event listener to the Lambda function and closing the connection pool when the event is triggered. Here is an example of the updated `nuxt.config.js` file:
module.exports = {
  // ... other configurations ...
  lambda: {
    handler: 'index.handler',
    events: [
      {
        http: {
          path: 'api/*',
          method: 'GET',
          integration: 'lambda',
          request: {
            passThrough: {
              whenNoMatch: 'never'
            }
          },
          // Add a close event listener to close the connection pool
          close: () => {
            const { Pool } = require('pg');
            const pool = new Pool({
              user: 'your_username',
              host: 'your_host',
              database: 'your_database',
              password: 'your_password',
              port: 5432,
            });
            pool.end();
          }
        }
      }
    ]
  }
};
We also need to update the `serverless.yml` file to include the `PGPOOL_MAX` environment variable to limit the connection pool size:
provider:
  name: aws
  runtime: nodejs14.x
  environment:
    PGPOOL_MAX: 10