Add netlify.app redirect

https://community.netlify.com/t/changes-coming-to-netlify-site-urls/8918

Author: tysongach

netlify.toml

@@ -2,6 +2,12 @@
   publish = "contrib/build"
   command = "npx parcel build contrib/index.html --out-dir contrib/build"
 
+[[redirects]]
+  from = "https://bitters.netlify.app/*"
+  to = "https://github.com/thoughtbot/bitters"
+  status = 301
+  force = true
+
 [[redirects]]
   from = "https://bitters.netlify.com/*"
   to = "https://github.com/thoughtbot/bitters"