add initial README.md

Signed-off-by: Jakub Sokołowski <jakub@status.im>

README.md

@@ -0,0 +1,19 @@
+# Description
+
+This repository is the source for https://docs.dappconnect.dev/.
+
+It is built using [mdBook](https://rust-lang.github.io/mdBook/).
+
+# Development
+
+You will need to [install mdBook](https://github.com/rust-lang/mdBook#installation).
+
+To start a server that also builds the page use:
+```
+mdbook serve
+```
+Will expose the built page under http://localhost:3000/.
+
+# Continuous Integration
+
+__TODO__