Continuous delivery

[dsparber]

• Get current master from Github
• ./scripts/migrate.sh
• ./scripts/makemessages
• Import translations from POEditor
• ./scripts/compilemessages
• docker-compose stop
• docker-compose -f docker-compose-production.yml start

[thgoebel]

Obsolete once migrated to VSETH SIP. We should nevertheless document these steps as part of #257 just for the reference.