nodebb on Heroku with postgres - how to add ssl param to database connection

[nodebber]

While trying to install nodebb on Heroku i am having problems to connect to postgres databases provided by Heroku add-ons - "Standard 0" and up. Connecting to lower performance Heroku postgres add-ons, like "Hobby dev" and "Hobby basic", works.

I found the recommendation to add a ssl param to the connection string when connecting to postgres via node.js apps but did not found the right place in the nodebb code to add an additional param (https://devcenter.heroku.com/articles/connecting-to-heroku-postgres-databases-from-outside-of-heroku).

Can anyone give me a hint?