Add Makefile

Makefile

@@ -0,0 +1,13 @@
+
+# Run a development server and load it in your default browser.
+# Will reload as soon as some source has changed.
+dev:
+	yarn start
+
+# Build the web application to be served by a static web server
+build:
+	yarn build
+
+# Copy build output to the /docs folder where it's served by Github pages
+dist: build
+	cp -r build docs