max connections time out

import { Injectable, Scope } from '@nestjs/common';
import { Pool, PoolConfig } from 'pg';
import { drizzle, NodePgDatabase } from 'drizzle-orm/node-postgres';
import { ConfigService } from '@nestjs/config';
import { sql } from 'drizzle-orm';
import { migrate } from 'drizzle-orm/node-postgres/migrator';
import { join } from 'path';

@Injectable({
  scope: Scope.TRANSIENT,
})
export class DrizzleService {
  private pool: Pool;
  private db: NodePgDatabase;

  constructor(private configService: ConfigService) {
    void this.connect();
  }

  private async connect(): Promise<void> {
    const poolConfig = {
      connectionString: this.configService.getOrThrow('database.databaseUrl'),
      ssl: false,
      keepAlive: true,
      max: this.configService.get('database.maxConnections') ?? 1,
    };
    this.pool = new Pool(poolConfig);
    this.db = drizzle(this.pool, {
      logger: true,
    });
    try {
      await migrate(this.db, {
        migrationsFolder: join(__dirname, '/migrations'),
      });
    } catch (error) {
      console.log(error, '-=-=-=-=-=-=->>');
    }
  }