docs: add instructions on how to temporary type a property added by a decorator

Author: devsheva

README.md

@@ -4,3 +4,19 @@
 ![Codecov](https://img.shields.io/codecov/c/github/devsheva/simplelog)
 
 A simple logger decorator amplify like
+
+## Important
+
+**Experimental decorators** are used for this package implementation and since experimental it has some bugs like unsafe typing.
+TypeScript compiler complains when it finds out a property used inside a class that calls a decorator cause it cannot infer it, so as a temporary workaround simply declare an interface
+
+```ts
+interface Example {logger: any}
+
+@Logger()
+class Example {
+   hello() {
+    this.logger.debug() // THIS IS VALID
+   }
+}
+```