Update readme

README.md

@@ -1 +1,17 @@
 # learning-haskell
+
+Hi and welcome!
+
+In this repository you will find my answers for the exercises from the haskell
+book: *Haskell programming from first principles.* I give no guarantee as to
+the correctness of my solutions, but if you want to compare your solutions to
+mine feel free to do so. That's why I made this public after all!
+
+There is one folder for every chapter in the book.
+
+I did most of the exercises using **vs code** and the **hackero** extension.
+
+There is one exercise I have not done (yet?) and that is the last one from
+chapter 24 (parser combinations) where you need to parse the *dot language* from
+GraphViz. So if you are looking for that specific exercise, you won't find it.
+All other exercises should be present though.