Local Development

Now that your Flask app is deployed on Upsun, you need a local environment to be able to make quick changes. You can use the built-in Flask development server.

To do so, follow these steps:

1. To allow your virtual environment to communicate with your database, run the following command:

   Terminal

   upsun tunnel:open -y

   An SSH tunnel to all the services for your app is open.
   To verify it’s open and working, run the following command:

   Terminal

   upsun tunnel:info

2. To instruct Upsun to prepare everything your Flask development server needs to start, run the following commands:

   Terminal

   npm install
   npm run build

3. To start your server, run the following command:

   Terminal

   npm run start

   You can now view your local instance at http://127.0.0.1:5000.

   Note

   You are now connected to your production database. Therefore, changes you make locally in the interface (such as adding a new user) are being added to production.
   To make changes without affecting production, see how you can set up a local development environment that creates copies of your database.