Make the software architecture more lightweight

[jo-elimu]

Hosting & infrastructure:

• Reduce size of webapp log files
  • Reduce log level within loops webapp#1726
  • Reduce log output during app launch webapp#1787
  • Reduce log output during unit testing webapp#1791
• Reduce webapp's memory consumption
  • Remove usage of i18n (ReloadableResourceBundleMessageSource)
  • Enable CDN for images webapp#1882
• Remove local copies of external libraries
  • Upgrade Chart.js to the latest version webapp#1350
• Reduce size of webapp database files
  • Move storage of APK files
  • Move storage of multimedia files
  • Add image deletion webapp#1361
  • Make it possible to delete images within storybook chapters webapp#1102
  • Set 4MB size limit for images webapp#1077
  • Add storage of width/height to Image model#207
  • Reduce size of GIF images before storing in database webapp#895
• Replace Audio recordings with Text-to-Speech (TTS)
  • Remove usage of audio recordings vitabu#111
  • Handle failing TTS initialization vitabu#102

Software distribution:

• Reduce the total download size when preparing the learning software on a new device
  • Calculate checksum of multimedia files when uploaded webapp#693
• Improve the speed of releasing updates of the learning software
  • Automate release management appstore#122
  • Automate Gradle releases analytics#135
  • Enable Maven publishing for Android Gradle Plugin 8.0 content-provider#114
  • Add version upgrade functionality content-provider#90
  • Document steps for releasing a new version content-provider#88
  • Add support for Room auto-migrations content-provider#78
  • Automate APK signing with Gradle script vitabu#92
  • Automate Gradle releases herufi#13
  • Add GitHub workflow for deployment of a specific release tag webapp#1792
  • Reduce the size of the webapp's .war file
• Prevent bugs from being released to production
  • Add regression testing to GitHub Action webapp#1768
  • Document steps for running regression tests webapp#1767
• Improve the speed of downloading the learning software
  • Consider replacing @CacheEvict with @CachePut webapp#670
  • Appstore: Simplify the steps for downloading content
• Improve the ease of downloading the learning software
  • Provide chosen language to other apps appstore#236
  • Create Appstore library to be used by other apps appstore#137
  • Add user setting for enabling/disabling APK downloads in the background appstore#150
  • List content that has been downloaded content-provider#32
  • Display progress bar while content is being downloaded content-provider#31
  • Configure TTS engine language vitabu#34
• Software installation
  • Enable launcher on Android 13 launcher#69
  • Check if the Content Provider has been installed before launching vitabu#39

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Relates to #156