Track .env.example — fix broken README reference

Author: Ekin-Kahraman

.env.example

@@ -0,0 +1,5 @@
+VITE_SUPABASE_PROJECT_ID="your-project-id"
+VITE_SUPABASE_PUBLISHABLE_KEY="your-anon-key"
+VITE_SUPABASE_URL="https://your-project.supabase.co"
+VITE_OPENMAIL_API_KEY="your-openmail-api-key"
+VITE_OPENMAIL_INBOX_ID="your-openmail-inbox-id"

.gitignore

@@ -25,4 +25,6 @@ dist-ssr
 
 # Environment
 .env
-.env.*
+.env.local
+.env.*.local
+!.env.example