- create dump of your localdb
- PGPASSWORD=yourpass pg_dump -Fc --no-acl --no-owner -h localhost -U username localdb_name > mydb.dump
- download file to dropbox and get the link
- change your link from 'https://www.dropbox.com/s/xxx/mydb.dump?dl=0 to 'https://dl.dropboxusercontent.com/s/xxx/mydb.dump'
- push to heroku:
- heroku pg:backups:restore https://dl.dropboxusercontent.com/s/xxx/mydb.dump DATABASE_URL -a yourAppName