add oauth flows, profile, logout page, and index page

imports/startup/server/accounts/oauth.js

@@ -0,0 +1,13 @@
+import { Meteor } from 'meteor/meteor';
+import { ServiceConfiguration } from 'meteor/service-configuration';
+
+const OAuthSettings = Meteor.settings.private.OAuth;
+
+if (OAuthSettings) {
+  Object.keys(OAuthSettings).forEach((service) => {
+    ServiceConfiguration.configurations.upsert(
+      { service },
+      { $set: OAuthSettings[service] },
+    );
+  });
+}