Use db:prepare instead of db:migrate (#924)

Use db:prepare instead of db:migrate

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

Procfile

@@ -1,3 +1,3 @@
-release: bundle exec rake db:migrate
+release: bundle exec rails db:prepare
 web: bin/rails server -p $PORT -e $RAILS_ENV
 worker: bundle exec sidekiq -C config/sidekiq.yml

app.json

@@ -12,9 +12,6 @@
     "vue"
   ],
   "success_url": "/app/login",
-  "scripts": {
-    "postdeploy": "bundle exec rake db:schema:load && bundle exec rake db:seed"
-  },
   "env": {
     "SECRET_TOKEN": {
       "description": "A secret key for verifying the integrity of signed cookies.",