Return sidekiq and redis to Dawarich

DEVELOPMENT.md

@@ -7,6 +7,12 @@ Now you can create/prepare the Database (this need to be done once):
 bundle exec rails db:prepare
 ```
 
+Afterwards you can run sidekiq:
+```bash
+bundle exec sidekiq
+
+```
+
 And in a second terminal the dawarich-app:
 ```bash
 bundle exec bin/dev