fix(backend): update welcome email instructions for MCP client setup

Author: Lasim

services/backend/src/email/templates/welcome.pug

@@ -31,16 +31,14 @@ block content
       |  and select your client (VS Code, Cursor, Claude Desktop)
 
     p
-      strong 3. Add to VS Code:
+      strong 3. Add to your MCP client:
       br
-      | Copy the configuration into your VS Code settings
-      br
-      code .vscode/settings.json
+      | Copy the configuration into your MCP client's settings
 
     p
       strong 4. Connect:
       br
-      | Restart VS Code - your browser will open for authorization
+      | Click on Connect or Start - your browser will open for authorization
       br
       | Select your team and authorize
       br
@@ -65,7 +63,7 @@ block content
 
   ul
     li 📚 Check our 
-      a(href="https://docs.deploystack.io/quick-start") quick start guide
+      a(href="https://docs.deploystack.io/general/quick-start") quick start guide
     li 💬 Join our 
       a(href="https://discord.gg/42Ce3S7b3b") Discord community
     li 🔍 Browse the