docs: add complete guide, env files, fix docker-compose

- Add GUIDE.md: complete user documentation covering installation,
  Docker deployment, AI providers, MCP server, N8N integration,
  email config, admin panel, env var reference, troubleshooting
- Add mcp-server/.env.example with all MCP-specific variables
- Update .env.docker.example with all 42 environment variables
- Fix docker-compose.yml: parameterize PostgreSQL credentials,
  add missing env vars (CUSTOM_OPENAI, AI_PROVIDER_CHAT,
  ALLOW_REGISTRATION, RESEND_API_KEY)
- Track memento-note/.env.example

memento-note/app/actions/auth-reset.ts

@@ -6,7 +6,7 @@ import { getSystemConfig } from '@/lib/config'
 import bcrypt from 'bcryptjs'
 import { getEmailTemplate } from '@/lib/email-template'
 
-// Helper simple pour générer un token sans dépendance externe lourde
+// Simple helper to generate a token without heavy external dependencies
 function generateToken() {
   const array = new Uint8Array(32);
   globalThis.crypto.getRandomValues(array);
@@ -19,7 +19,7 @@ export async function forgotPassword(email: string) {
   try {
     const user = await prisma.user.findUnique({ where: { email: email.toLowerCase() } });
     if (!user) {
-      // Pour des raisons de sécurité, on ne dit pas si l'email existe ou pas
+      // For security reasons, don't reveal whether the email exists
       return { success: true }; 
     }
 
@@ -34,7 +34,7 @@ export async function forgotPassword(email: string) {
       }
     });
 
-    const resetLink = `${process.env.NEXTAUTH_URL || 'http://localhost:3000'}/reset-password?token=${token}`;
+    const resetLink = `${process.env.NEXTAUTH_URL}/reset-password?token=${token}`;
 
     const html = getEmailTemplate(
       "Reset your Password",