📝 update README

README.md

@@ -6,10 +6,22 @@ The bot calls the Api and sends the invitation link via e-mail to a given receip
 
 ## Usage
 
-Use container image or run this after cloning: 
+Use container image or run this after cloning. In both cases you need to create a `.env` file containing the matrix and mail server credentials:
+
+```
+cp. .env.example .env
+```
+
+If you want to run it without the container you can run it like this:
+
 
 ```
 . bin/activate
 python -m matrix_bot_invitation_mailer
 ```
 
+And for use with docker run it like this:
+
+```
+docker compose up -d
+```