Fix Docker Compose depends_on Not Working

# docker-compose.yml
services:
  postgres:
    image: postgres:16
    environment:
      POSTGRES_USER: myuser
      POSTGRES_PASSWORD: mypassword
      POSTGRES_DB: mydb
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U myuser -d mydb"]
      interval: 5s
      timeout: 5s
      retries: 5
      start_period: 10s

  redis:
    image: redis:7
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 5s
      retries: 5
      start_period: 5s

  web:
    build: .
    ports:
      - "3000:3000"
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    environment:
      DATABASE_URL: postgresql://myuser:mypassword@postgres:5432/mydb
      REDIS_URL: redis://redis:6379

// Node.js / TypeScript — retry with exponential backoff
async function connectWithRetry(
  connectFn: () => Promise<void>,
  maxRetries = 10,
  baseDelay = 1000,
): Promise<void> {
  for (let attempt = 1; attempt <= maxRetries; attempt++) {
    try {
      await connectFn();
      console.log(`Connected on attempt ${attempt}`);
      return;
    } catch (error) {
      if (attempt === maxRetries) {
        throw new Error(
          `Failed to connect after ${maxRetries} attempts: ${error}`
        );
      }
      const delay = baseDelay * Math.pow(2, attempt - 1);
      console.warn(
        `Attempt ${attempt} failed, retrying in ${delay}ms...`
      );
      await new Promise(resolve => setTimeout(resolve, delay));
    }
  }
}

// Usage:
await connectWithRetry(async () => {
  const pool = new Pool({ connectionString: DATABASE_URL });
  await pool.query('SELECT 1');
});

# docker-compose.yml (legacy approach)
services:
  postgres:
    image: postgres:16
    environment:
      POSTGRES_USER: myuser
      POSTGRES_PASSWORD: mypassword

  web:
    build: .
    command: >
      sh -c "
        wget -qO- https://raw.githubusercontent.com/eficode/wait-for-it/master/wait-for-it.sh > /tmp/wait-for-it.sh &&
        chmod +x /tmp/wait-for-it.sh &&
        /tmp/wait-for-it.sh postgres:5432 --timeout=60 --strict &&
        node server.js
      "
    depends_on:
      - postgres