Add puro config to git :)

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

.gitignore

@@ -50,3 +50,6 @@ app.*.map.json
 **/android/app/debug
 **/android/app/profile
 **/android/app/release
+
+# Puro
+!/.puro.json

.puro.json

@@ -0,0 +1,3 @@
+{
+  "env": "stable"
+}