• Fork and clone the project in your device.
• pipenv shell(If you're not aware of what pipenv, have look at this blog).
• pipenv install

Below steps talk about creating and securing your firebase admin credentials, this step needs to be done only once for setting up your .env file.

• Go to Firebase console and create a firebase project.
• In firebase console go to settings > Service accounts
• Click Generate New Private Key, then confirm by clicking Generate Key.
• Save the Json file containing key details, with name firebase_admin.json in same level directory as manage.py.
• Open a file named encrypt_credentials.py already present in same directory, and edit the password(line: 6) you want to use for encryption. Note: You are advised to use long and random password, as you do not need to remember it after that.
• Run python encrypt_credentials.py to encrypt your Json file. This will generate a file named firebase_admin.aes and will also print FIREBASE_DECRYPT_SIZE in the output.
• Create a file named .env and copy contents into it from another file named template_env which is already present.
• In your .env file put the value of FIREBASE_DECRYPT_KEY as the password you used for encryption, and FIREBASE_DECRYPT_SIZE as the number generated in output that came after encrypting the file.
• Undo the changes you made to encrypt_credentials.py(that is again make the password as please-use-a-long-random-password), otherwise your encryption key(password) will become public.

You have successfully created required environment variables.

• Now you can apply the migrations and start the server