Release 0.5.0

Added

• add troubleshooting guide
• create server image tagged with branch or tag automatically

Changed

• serve veloren locally (removes s3 support) #147

Fixed

• Gitlab Pipeline Event model
• CI not running on forks
• quote paths in msiexec call
• validate response status before download
• only use one rustfmt.toml
• leave one artifact per os on prune
• reduced minimum window size
• check status of webhook response