docs(deploy): add public/README for founder photo upload

User copies prabhat.jpg -> dashboard/public/founder.jpg before deploy so the
founder section photo serves correctly.

Author: crewcricle

dashboard/public/README.md

@@ -0,0 +1,15 @@
+# dashboard/public/
+
+Place founder photo here as `founder.jpg` (any size, ~600×800 portrait works).
+If prabhat.jpg is missing, the marketing site shows a `founder.jpg` link that will 404.
+
+To use your photo:
+```bash
+cp /path/to/prabhat.jpg /Users/prabhatranjan/Business/crewcircle/localmate/dashboard/public/founder.jpg
+```
+
+Then redeploy:
+```bash
+cd /Users/prabhatranjan/Business/crewcircle/localmate/dashboard
+vercel deploy --prebuilt --prod --yes
+```