Update README.md

Author: J-Lindvig

README.md

@@ -1,2 +1,41 @@
 # Pollen_DK
-Scraping of pollen count in Denmark
+
+## Introduction
+Scraping of pollen count in Denmark.
+
+## Installation
+### Custom integration in HACS
+https://hacs.xyz/docs/faq/custom_repositories
+
+## Configuration
+In the default configuration it will track pollen in these regions of Denmark
+- øst     # Øst for Stroebælt
+- vest    # Vest for Stroebælt
+
+Pollen type:
+- Alternaria
+- Birk
+- Bynke
+- Cladosporium
+- El
+- Elm
+- Græs
+- Hassel
+
+## Configuration
+### Minimal - track all pollentypes in all regions
+```yaml
+pollen_dk:
+```
+### Filtered - track only selected pollentypes in specific regions
+```yaml
+pollen_dk:
+  # Optional values, if omitted all values will used
+  regions:        # Possible values: øst, vest
+    - vest
+    - øst
+  pollen_types:   # Possible values: alternaria, birk, bynke, cladosporium, el, elm, græs, hassel
+    - græs
+    - el
+    - elm
+```