Update Dockerfile with python3 dependency
Created by: chimiana
What
Added python3 to the Dockerfile 'apk add' step, to allow 'yarn install' during docker-compose build to complete successfully.
Why
The docker-compose build step was failing, and running calckey with docker was impossible.
Additional info (optional)
These modules could not be built successfully without python3:
- bufferutil@npm
- utf-8-validate@npm
- re2@npm