docs: improve dashboard env example + cloudflare setup

apps/dashboard/.env.example

@@ -1,37 +1,42 @@
-# Supabase setup - Required
+# *Supabase setup - learn more https://classroomio.com/docs/contributor-guides/supabase-cloud
 PUBLIC_SUPABASE_URL=http://localhost:54321
 PUBLIC_SUPABASE_ANON_KEY=
 PRIVATE_SUPABASE_SERVICE_ROLE=
 
-# Selfhosting
+# Selfhosting - should be true if you are selfhosting
 IS_SELFHOSTED=false
 
 # Unsplash setup - Optional if you want to use Unsplash images
 UNSPLASH_API_KEY=
 
-VITE_SENTRY_AUTH_TOKEN=
-VITE_SENTRY_ORG_NAME=
-VITE_SENTRY_PROJECT_NAME=
-# Configure https locally https://stackoverflow.com/a/76525335
-USE_HTTPS_ON_LOCALHOST=false
-
-# OpenAI setup - Optional if you want to use OpenAI
+# OpenAI setup - Optional if you want to use the AI features
 OPENAI_API_KEY=
 
 # Sever URL - Optional if you want to use video upload and pdf downloads
+# This is the deployment URL of apps/backend
 PUBLIC_SERVER_URL=
 
 # For getting metadata for signup users.
 PUBLIC_IP_REGISTRY_KEY=
 
-# Domain management
+# Domain management - should be your domain
+# The final domain is app.classroomio.com where `app` is PRIVATE_APP_SUBDOMAINS and `classroomio.com` is PRIVATE_APP_HOST
 PRIVATE_APP_HOST=classroomio.com
 PRIVATE_APP_SUBDOMAINS=app
 
+
+# ============  CLOUD VERSION SPECIFIC ============
 LEMON_SQUEEZY_API_KEY=
 LEMON_SQUEEZY_STORE_ID=
 LEMON_SQUEEZY_WEBHOOK_SECRET=
 
+VITE_SENTRY_AUTH_TOKEN=
+VITE_SENTRY_ORG_NAME=
+VITE_SENTRY_PROJECT_NAME=
+
+# Configure https locally https://stackoverflow.com/a/76525335
+USE_HTTPS_ON_LOCALHOST=false
+
 ## Custom Domain
 TEAM_ID_VERCEL=
 PROJECT_ID_VERCEL=