To connect a PostgreSQL database with Jet Admin, add a new resource and choose "PostgreSQL" from the list of available integrations. Type in your database connection details.
Setting up separate resources for read and write access is a good start to prevent anyone on the team causing unwanted changes to your database.
Resources > Add > PostgreSQL
If you'd like, you can connect your database via Docker, Cloud Heroku, or a Python app. Simply select your preferred deployment method and follow the instructions.