Best Open-Source Alternatives to Calendly

version: "3.8"
services:
  calcom:
    image: calcom/cal.com:latest
    ports:
      - "${PORT:-3000}:3000"
    environment:
      DATABASE_URL: postgresql://calcom:${DB_PASSWORD:-calcom_pwd}@postgres:5432/calcom
      NEXT_PUBLIC_WEBAPP_URL: "${APP_URL:-http://localhost:3000}"
      CALENDSO_ENCRYPTION_KEY: "${ENCRYPTION_KEY:-secret_32_char_encryption_key_2026}"
    depends_on:
      - postgres
    restart: unless-stopped
  postgres:
    image: postgres:15-alpine
    environment:
      POSTGRES_USER: calcom
      POSTGRES_PASSWORD: ${DB_PASSWORD:-calcom_pwd}
      POSTGRES_DB: calcom
    volumes:
      - calcom_pg_data:/var/lib/postgresql/data
volumes:
  calcom_pg_data: