diff --git a/README.md b/README.md
index 6d4c870..4e1634e 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,22 @@
 
 *DWDeathermap* is an open-source application to make the DWD services usable in an App (Android/Web) for free.
 
+# Contributing
+
+Everybody who wants to contribute in a coding way can do that via:
+1. cloning the repo locally
+2. writing the new/optimized/better/whatever code
+3. creating a pull request
+
+---
+
+The development flask server (for the web app) can be started with
+```sh
+python3 main.py
+```
+in the root directory.
+
+
 # LICENSE
 This is free and unencumbered software released into the public domain.