This commit adds a `useUnless` helper method which can be used as a middleware for express.
It receives an express-middleware and an array of paths.
When a request matches one of the given paths, this middleware does nothing.
Otherwise the given middleware is called.
For the express-session middleware this helper middleware is used to avoid session creation on purely status routes.
See #1446
Signed-off-by: Erik Michelson <github@erik.michelson.eu>
Add simple SVG image detecetion base on the file extension .svg.
This fixes the SVG being delivered as binary/octet-stream and makes it possible to embedd the SVG.
Signed-off-by: Lennart Weller <lennart.weller@hansemerkur.de>
