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

imports/startup/server/accounts/email-templates.js

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+import { Meteor } from 'meteor/meteor';
+import { Accounts } from 'meteor/accounts-base';
+
+const name = 'Application Name';
+const email = '<support@application.com>';
+const from = `${name} ${email}`;
+const emailTemplates = Accounts.emailTemplates;
+
+emailTemplates.siteName = name;
+emailTemplates.from = from;
+
+emailTemplates.resetPassword = {
+  subject() {
+    return `[${name}] Reset Your Password`;
+  },
+  text(user, url) {
+    const userEmail = user.emails[0].address;
+    const urlWithoutHash = url.replace('#/', '');
+
+    if (Meteor.isDevelopment) console.info(`Reset Password Link: ${urlWithoutHash}`);
+
+    return `A password reset has been requested for the account related to this
+    address (${userEmail}). To reset the password, visit the following link:
+    \n\n${urlWithoutHash}\n\n If you did not request this reset, please ignore
+    this email. If you feel something is wrong, please contact our support team:
+    ${email}.`;
+  },
+};

imports/startup/server/accounts/index.js

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+import './oauth';
+import './email-templates';

imports/startup/server/accounts/oauth.js

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+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] },
+    );
+  });
+}

imports/startup/server/accounts/on-create-user.js

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+import { Accounts } from 'meteor/accounts-base';
+
+Accounts.onCreateUser((options, user) => {
+  const userToCreate = user;
+  if (options.profile) userToCreate.profile = options.profile;
+  return userToCreate;
+});