Move src to dashboard (#152)

app/javascript/dashboard/constants.js

@@ -0,0 +1,16 @@
+export default {
+  APP_BASE_URL: '/',
+  PUSHER: __PUSHER__,
+  get apiURL() {
+    return `${this.APP_BASE_URL}/`;
+  },
+  GRAVATAR_URL: 'https://www.gravatar.com/avatar/',
+  CHANNELS: {
+    FACEBOOK: 'facebook',
+  },
+  ASSIGNEE_TYPE_SLUG: {
+    MINE: 0,
+    UNASSIGNED: 1,
+    OPEN: 0,
+  },
+};