Add ONBOARDING_EMAIL support and fix email templates

Add optional per-email from address to EmailService, used by
welcome emails via the new ONBOARDING_EMAIL env variable.
Align HTML templates with their text counterparts and add
missing footer to invitation HTML.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bchapuis

apps/api/src/auth.ts

@@ -525,6 +525,7 @@ async function completeOAuthLogin(
         onboardingUrl: c.env.ONBOARDING_URL,
       });
       const result = await emailService.send({
+        from: c.env.ONBOARDING_EMAIL,
         to: userData.email,
         subject: emailContent.subject,
         html: emailContent.html,

apps/api/src/context.ts

@@ -70,6 +70,7 @@ export interface Bindings {
   STRIPE_PRICE_ID_PRO?: string;
   STRIPE_METER_ID?: string;
   ONBOARDING_URL?: string;
+  ONBOARDING_EMAIL?: string;
 }
 
 export interface Variables {

apps/api/src/services/email-service.ts

@@ -3,6 +3,7 @@ import { AwsClient } from "aws4fetch";
 import type { Bindings } from "../context";
 
 export interface EmailOptions {
+  from?: string;
   to: string | string[];
   subject: string;
   html?: string;
@@ -52,7 +53,7 @@ export class EmailService {
    * Send an email using Amazon SES
    */
   async send(options: EmailOptions): Promise<EmailResult> {
-    const { to, subject, html, text, replyTo } = options;
+    const { from, to, subject, html, text, replyTo } = options;
 
     if (!to || !subject) {
       return {
@@ -78,7 +79,7 @@ export class EmailService {
 
       const params = new URLSearchParams();
       params.set("Action", "SendEmail");
-      params.set("Source", this.fromAddress);
+      params.set("Source", from ?? this.fromAddress);
 
       for (let i = 0; i < toArray.length; i++) {
         params.set(`Destination.ToAddresses.member.${i + 1}`, toArray[i]);

apps/api/src/services/email-templates.ts

@@ -24,7 +24,7 @@ export function getWelcomeEmail(params: WelcomeEmailParams): {
 
   const text = `Let's automate something${userName ? `, ${userName}` : ""}.
 
-Dafthunk is a visual way to build serverless workflows. Drag nodes, connect them, deploy to the edge.
+Dafthunk is a visual way to build serverless workflows on Cloudflare. Drag nodes, connect them, deploy to the edge.
 
 Here are some quick tips:
 • Start from a use case template to see how nodes wire together
@@ -38,14 +38,14 @@ ${onboardingUrl ? `Want a walkthrough? Book an onboarding session: ${onboardingU
 Questions? GitHub issues or Discord.
 
 Happy automating,
-The Dafthunk team
+Bertil Chapuis
 
 —
 Dafthunk · Visual workflow automation
 ${websiteUrl}`;
 
   const html = `<p>Let's automate something${userName ? `, ${userName}` : ""}.</p>
-<p>Dafthunk is a visual way to build serverless workflows. Drag nodes, connect them, deploy to the edge.</p>
+<p>Dafthunk is a visual way to build serverless workflows on Cloudflare. Drag nodes, connect them, deploy to the edge.</p>
 <p>Here are some quick tips:</p>
 <ul>
 <li>Start from a use case template to see how nodes wire together</li>
@@ -55,8 +55,10 @@ ${websiteUrl}`;
 <li>Browse the Nodes Reference to see all 400+ available nodes</li>
 <li>Bonus: it's open source (MIT). Self-host it and contribute</li>
 </ul>
-${onboardingUrl ? `<p>Want a walkthrough? <a href="${onboardingUrl}">Book an onboarding session</a></p>\n` : ""}<p><a href="${docsUrl}">Docs</a> · Questions? GitHub issues or Discord.</p>
-<p>Happy automating,<br>The Dafthunk team</p>`;
+${onboardingUrl ? `<p>Want a walkthrough? <a href="${onboardingUrl}">Book an onboarding session</a></p>\n` : ""}<p><a href="${docsUrl}">Docs</a></p>
+<p>Questions? GitHub issues or Discord.</p>
+<p>Happy automating,<br>Bertil Chapuis</p>
+<p>—<br>Dafthunk · Visual workflow automation<br><a href="${websiteUrl}">${websiteUrl}</a></p>`;
 
   return { subject, text, html };
 }
@@ -102,7 +104,8 @@ ${websiteUrl}`;
 
   const html = `<p>${inviterName} invited you to join ${organizationName} on Dafthunk as a ${role}.</p>
 <p><a href="${invitationsUrl}">View Invitation</a></p>
-<p>This invite expires on ${expiresFormatted}.</p>`;
+<p>This invite expires on ${expiresFormatted}.</p>
+<p>—<br>Dafthunk · Visual workflow automation<br><a href="${websiteUrl}">${websiteUrl}</a></p>`;
 
   return { subject, text, html };
 }