4.5.3

• a9e086ab - bugfix image gallery fullscreen mode
• 753e6769 - bugfix show stadium
• 35056e64 - update world cup template
• cc481ab9 - update world cup template
• 5620dfd4 - limit stadium field to 20 char
• c3d93ef8 - limit stadium field to 20 char
• baacd537 - small refactoring; added test
• 0dd3a5de - cleanup
• 868745c5 - added test
• 10783887 - added test; refactoring
• 2c7cbc74 - optimized docker file
• fc5fa7a0 - optimized docker file
• ad2b773f - showing bets of users in excel file when match has result entered (#76)