* Update readme on internationalization
* Run compilemessages when building production image
* Run compilemessages when deploying to Heroku
* Always keep Heroku post-compile hooks
* Add empty po file for en-US language
* Update instructions for Docker
* Update default po file
* Convert locale readme to markdown and expand a bit the instructions
* Don't compile translations for 3rd party packages
* Use simplified settings & set env variables for compiling translations
* Update README for translations
* Improve metadata for Brazilian Portuguese translations
* Fix condition for django compressor on Heroku
* Fix condition for Django Compressor
* Move to the python:alpine docker image
- Switch the base images for local and production to alpine
- Install extra dependencies for psycopg2, Pillow and cffi
- Change shebang for shell scripts to use sh instead of bash
* Move to the python:alpine docker image
- Migrate group and user creation to Alpine syntax
* Move to the python:alpine docker image
- Remove `function` keyword, unsupported in shell
* Upgrade various places to the latest Python 3.6
* Test support for translations
* Add gettext library, required for translations support
* Add locale folder for translations support with README documenting it
* Update Changelog
* Tweak command to test translations support