Add readme with build instrucitons

README.md

@@ -0,0 +1,17 @@
+# Cinny desktop
+
+## Local development
+
+To setup development locally run the following commands:
+* `git clone --recursive https://github.com/cinnyapp/cinny-desktop.git`
+* `cd cinny`
+* `npm ci`
+* `cd ..`
+* `npm ci`
+
+Now to build the app locally, run:
+* `npm run tauri build`
+
+To start local dev server, run:
+* Open cinny submodule dir in terminal and run `npm start`
+* Now main dir in another termial window run `npm run tauri dev`