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ImageField requires the Pillow library, see here: https://docs.djangoproject.com/en/dev/ref/models/fields/, no two ways around that. You will need to install it. There are several solutions in your case:
- Install/get permission to run gcc on the server
- Compile somewhere else, where the setup is identical and copy the files
- Change your code to not use ImageField
Source:stackexchange.com