remove config from gitignore

.gitignore

@@ -18,7 +18,6 @@ website/themes/uppy/source/uppy/
 website/themes/uppy/_config.yml
 
 npm-debug.log*
-config/
 nohup.out
 
 examples/bundled-example/bundle.js

packages/@uppy/service-dog/src/config/grant.js

@@ -0,0 +1,19 @@
+// oauth configuration for provider services that are used.
+module.exports = () => {
+  return {
+    google: {
+      scope: [
+        'https://www.googleapis.com/auth/drive.readonly'
+      ],
+      callback: '/drive/callback'
+    },
+    dropbox: {
+      authorize_url: 'https://www.dropbox.com/oauth2/authorize',
+      access_url: 'https://api.dropbox.com/oauth2/token',
+      callback: '/dropbox/callback'
+    },
+    instagram: {
+      callback: '/instagram/callback'
+    }
+  }
+}