add short description and credit

README.md

@@ -1 +1,11 @@
-# Refactoring in progress
+# Maciek Sitkowski Portfolio
+
+Hi, I'm Maciek Sitkowski, this is my personal portfolio. You can find here a
+little bit about myself, my projects and a way to contact me.
+
+## Credit
+
+This portfolio is hugely inspired by
+[Kent C. Dodds personal website](https://github.com/kentcdodds/kentcdodds.com).
+I've never used Gatsby before so Kent's source code was an amazing source of
+knowledge for me and I learned a great deal while reusing it.