Replace NEXT_PUBLIC_BREVO_FORM_URL env var with hardcoded constant in lib/newsletter.ts

Co-authored-by: bobbyiliev <21223421+bobbyiliev@users.noreply.github.com>

Author: Copilot

.env.example

@@ -17,7 +17,3 @@ WATCHPACK_POLLING=true
 
 # Optional: API Keys (if needed)
 # OPENAI_API_KEY=your_api_key_here
-
-# Brevo (newsletter) — set to your Brevo subscription form URL
-# e.g. https://sibforms.com/serve/MUIFAAAA...
-# NEXT_PUBLIC_BREVO_FORM_URL=https://sibforms.com/serve/YOUR_FORM_ID_HERE

app/books/devops-survival-guide/client-content.tsx

@@ -4,6 +4,7 @@ import { useState, useEffect } from 'react';
 import { Button } from '@/components/ui/button';
 import { Badge } from '@/components/ui/badge';
 import { Card, CardDescription, CardHeader, CardTitle, CardContent } from '@/components/ui/card';
+import { BREVO_FORM_URL } from '@/lib/newsletter';
 import {
   BookOpen,
   Rocket,
@@ -525,7 +526,7 @@ export function ClientContent() {
             <div className="max-w-md mx-auto">
               <div className="p-8 bg-linear-to-br from-primary/5 to-purple-500/5 border-2 border-primary/20 rounded-2xl shadow-2xl backdrop-blur-sm">
                 <form
-                  action={process.env.NEXT_PUBLIC_BREVO_FORM_URL ?? '#'}
+                  action={BREVO_FORM_URL}
                   method="post"
                   target="_blank"
                   noValidate

components/book-promotion-popup.tsx

@@ -5,6 +5,7 @@ import { motion, AnimatePresence } from 'framer-motion'
 import { BookOpen, X, Sparkles } from 'lucide-react'
 import { Button } from '@/components/ui/button'
 import Confetti from 'react-confetti'
+import { BREVO_FORM_URL } from '@/lib/newsletter'
 
 export function BookPromotionPopup() {
   const [isVisible, setIsVisible] = useState(false)
@@ -157,7 +158,7 @@ export function BookPromotionPopup() {
 
                       <form
                         onSubmit={handleSubscribe}
-                        action={process.env.NEXT_PUBLIC_BREVO_FORM_URL ?? '#'}
+                        action={BREVO_FORM_URL}
                         method="post"
                         target="_blank"
                         className="space-y-2"

components/footer/newsletter-form.tsx

@@ -1,8 +1,7 @@
 import { Mail, ArrowRight } from 'lucide-react';
+import { BREVO_FORM_URL } from '@/lib/newsletter';
 
 export function NewsletterForm() {
-  const brevoFormUrl = process.env.NEXT_PUBLIC_BREVO_FORM_URL ?? '#';
-
   return (
     <div className="p-6 bg-linear-to-br from-primary/5 to-purple-500/5 border border-primary/20 rounded-2xl shadow-lg">
       <div className="flex items-center gap-2 mb-3">
@@ -13,7 +12,7 @@ export function NewsletterForm() {
         Get the latest DevOps insights delivered to your inbox weekly.
       </p>
       <form
-        action={brevoFormUrl}
+        action={BREVO_FORM_URL}
         method="post"
         target="_blank"
         noValidate

components/sponsor-sidebar.tsx

@@ -4,6 +4,7 @@ import { cn } from '@/lib/utils';
 import { Clock, Sparkles, ExternalLink } from 'lucide-react';
 import { CarbonAds } from '@/components/carbon-ads';
 import { sponsors } from '@/lib/sponsors';
+import { BREVO_FORM_URL } from '@/lib/newsletter';
 
 interface SponsorSidebarProps {
   className?: string;
@@ -98,7 +99,7 @@ export function SponsorSidebar({ className, relatedPosts = [] }: SponsorSidebarP
           Get the latest DevOps tips and tutorials delivered to your inbox.
         </p>
         <form
-          action={process.env.NEXT_PUBLIC_BREVO_FORM_URL ?? '#'}
+          action={BREVO_FORM_URL}
           method="post"
           target="_blank"
           noValidate

lib/newsletter.ts

@@ -0,0 +1,6 @@
+/**
+ * Brevo subscription form URL.
+ * This is a public URL — it is safe to commit and requires no environment variable.
+ * To find yours: Brevo dashboard → Email → Subscription Forms → your form → Share.
+ */
+export const BREVO_FORM_URL = 'https://sibforms.com/serve/YOUR_FORM_ID_HERE';