Update secret value generation code examples in docs

Author: YuriiMotov

README.md

@@ -147,7 +147,7 @@ Some environment variables in the `.env` file have a default value of `changethi
 You have to change them with a secret key, to generate secret keys you can run the following command:
 
 ```bash
-python -c "import secrets; print(secrets.token_urlsafe(32))"
+python -c "import secrets; print(secrets.token_urlsafe(32)[:40])"
 ```
 
 Copy the content and use that as password / secret key. And run that again to generate another secure key.

deployment.md

@@ -158,7 +158,7 @@ Some environment variables in the `.env` file have a default value of `changethi
 You have to change them with a secret key, to generate secret keys you can run the following command:
 
 ```bash
-python -c "import secrets; print(secrets.token_urlsafe(32))"
+python -c "import secrets; print(secrets.token_urlsafe(32)[:40])"
 ```
 
 Copy the content and use that as password / secret key. And run that again to generate another secure key.