• Build Roundcube from Source
• 1. Fetch the source from github
• 2. Switch to the according branch
• 3. Install JavaScript dependencies
• 4. Compress Javascript files and add cache-buster tokens to images referenced from CSS styles
• 5. Optionally compress CSS files as well
• 6. Remove development stuff, installer and git files
• 7. Download and configure Composer
• 8. Optionally, add dependencies for LDAP modules in order to enable LDAP address books in Roundcube
• 9. Install PHP dependencies using Composer