Misc changes.

Some small changes in general:
- Moved the SQL Version check struct into the function.
- Updated hadolint to 2.0.0
- Fixed hadolint 2.0.0 warnings
- Updated github workflows
- Added .editorconfig for some general shared editor settings.

.dockerignore

@@ -4,6 +4,8 @@ target
 # Data folder
 data
 .env
+.env.template
+.gitattributes
 
 # IDE files
 .vscode