added render

services:

  - type: web

    name: rock_catalog

    plan: starter

    env: python

    region: frankfurt  # region should be same as your database region.

    buildCommand: "./build.sh"

    startCommand: "gunicorn run:app"

    envVars:

      - key: SECRET_KEY

        generateValue: true

      - key: WEB_CONCURRENCY

        value: 4