Environment Variables

Environment variables are closely related to the technology of Docker. They are usually written in the .env or .txt file right in the project directory. The main reason for using environment variables is to improve the flexibility of your application when using Docker. You can for example use a PORT environment variable to specify on which port to run a backend application (e.g., PORT=80).

Prerequisites

Environment variables are associated with application components. To update or create environment variables, you thus need the associated component to exist, or be in the process of creating it.

Steps

The following animation details how to create or update environment variables for an already existing application component:

Navigate to your application dashboard

Scroll down to the relevant application

Scroll down to the relevant application

Select it to view the application details

Scroll down to the relevant component

Scroll down to relevant component

Select the component

Scroll down to Build Properties

Click on Add new property

Set the name of the environment variable

Set the value of the environment variable

Save your changes

In the same place, you can remove existing environment variables

You will be asked to confirm the deletion

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How to add an environment variable for an existing component

You also have the possibility to create environment variables when you create a new component:

Select the relevant application

Create a new component

Name the component

Scroll down to Advanced Configuration

Scroll down to Advanced Configuration

Click on Advanced Configuration

The dropdown will show the build properties

Click on Add new property

Set the name of the environment variable

Set the value of the environment variable

Set the value of the environment variable

When you are done defining the component, click Confirm

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How to add an environment variable for a new component