I found a service from heruko https://postgres.heroku.com/ you can get 10K rows for a one database free.

And i try to running it.

Firts i create a database:

Host ec2-23-21-85-197.compute-1.amazonaws.com
Database d851it4166aeu6
User pmeymnjxpvdyri
Port 5432
Password: XXXXX

Ok now on trytond.conf config file, i change the params.

db_host = ec2-23-21-85-197.compute-1.amazonaws.com  
db_port = 5432  
db_user = 'pmeymnjxpvdyri'  
db_password = 'XXXXXX'  

save the file and run

bin/trytond -i all -d d851it4166aeu6

This make a new database.

Now need run trytond for connect:

bin/trytond