Add build script

.render.com/build.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+set -o errexit
+
+python -m pip install --upgrade pipenv wheel
+pipenv install
+
+python manage.py migrate

render.yaml

@@ -7,6 +7,7 @@ services:
   - type: web
     name: babybuddy
     env: python
+    buildCommand: "./.render.com/build.sh"
     startCommand: "gunicorn babybuddy.wsgi:application"
     envVars:
       - key: DJANGO_SETTINGS_MODULE