docs: improve instructions about running the example app (#241)

jtomaszewski · web-flow · commit 2f829351a5df · 2020-08-13T20:43:38.000+02:00
diff --git a/.gitignore b/.gitignore
@@ -49,3 +49,5 @@ android/keystores/debug.keystore
 
 # generated by bob
 lib/
+
+.expo
diff --git a/Example/.gitignore b/Example/.gitignore
@@ -5,3 +5,4 @@ npm-debug.*
 *.p12
 *.key
 *.mobileprovision
+web-build
diff --git a/README.md b/README.md
@@ -104,6 +104,7 @@ More complex examples can be found in the `Example` folder. To view the examples
 
 ```sh
 yarn
+yarn prepare
 cd Example
 yarn
 expo start

-Original file line number
+Diff line change
 # generated by bob
 lib/
++
 +.expo