fix: remove all extraneous env vars (#39443)

sample.env

@@ -1,57 +1,73 @@
-COMPOSE_PROJECT_NAME=freecodecamp
+# ---------------------
+# API
+# ---------------------
+# Database
 MONGOHQ_URL='mongodb://localhost:27017/freecodecamp'
 
-ALGOLIA_ADMIN_KEY=123abc
-ALGOLIA_APP_ID=X5V7KWJ4RB
-ALGOLIA_API_KEY=a45d2b80c97479bbda5cf5c55914230f
+# Logging
+SENTRY_DSN=dsn_from_sentry_dashboard
+SENTRY_ENVIRONMENT='staging'
 
-AUTH0_CLIENT_ID=stuff
-AUTH0_CLIENT_SECRET=stuff
-AUTH0_DOMAIN=stuff
+# Auth0 - OAuth 2.0 Credentials
+AUTH0_CLIENT_ID=client_id_from_auth0_dashboard
+AUTH0_CLIENT_SECRET=client_secret_from_auth0_dashboard
+AUTH0_DOMAIN=example.auth0.com
 
-SESSION_SECRET=secretstuff
-COOKIE_SECRET='this is a secret'
-JWT_SECRET='a very long secret'
+# Session, Cookie and JWT encryption strings
+SESSION_SECRET=a_session_secret
+COOKIE_SECRET=a_cookie_secret
+JWT_SECRET=a_jwt_secret
 
+# ---------------------
+# Search
+# ---------------------
+# Indexing
+ALGOLIA_ADMIN_KEY=admin_key_from_algolia_dashboard
+GHOST_CLIENT_KEY=client_key_from_ghost_dashboard
+# Client Search Bar
+ALGOLIA_APP_ID=app_id_from_algolia_dashboard
+ALGOLIA_API_KEY=api_key_from_algolia_dashboard
+
+# ---------------------
+# Donations
+# ---------------------
+# Stripe
 STRIPE_CREATE_PLANS=true
 STRIPE_PUBLIC_KEY=pk_from_stripe_dashboard
 STRIPE_SECRET_KEY=sk_from_stripe_dashboard
 SERVICEBOT_ID=servicebot_id_from_servicebot_dashboard
 SERVICEBOT_HMAC_SECRET_KEY=secret_key_from_servicebot_dashboard
-
+# PayPal
 PAYPAL_SUPPORTERS=1703
-
 PAYPAL_CLIENT_ID=id_from_paypal_dashboard
 PAYPAL_SECRET=secret_from_paypal_dashboard
 PAYPAL_VERIFY_WEBHOOK_URL='https://api.sandbox.paypal.com/v1/notifications/verify-webhook-signature'
 PAYPAL_API_TOKEN_URL='https://api.sandbox.paypal.com/v1/oauth2/token'
 PAYPAL_WEBHOOK_ID=webhook_id_from_paypal_dashboard
+
+# ---------------------
+# Build variants
+# ---------------------
 DEPLOYMENT_ENV='staging'
-
-PEER=stuff
-DEBUG=true
-LOCAL_MOCK_AUTH=true
-
-IMAGE_BASE_URL='https://s3.amazonaws.com/freecodecamp/images/'
-
+FREECODECAMP_NODE_ENV='development'
+# Language to build
+LOCALE=english
+# Show or hide WIP in progress challenges
+SHOW_HIDDEN=true
+# Application paths
 HOME_LOCATION='http://localhost:8000'
 API_LOCATION='http://localhost:3000'
 FORUM_LOCATION='https://localhost/forum'
 NEWS_LOCATION='https://localhost/news'
-FORUM_PROXY='https://forum.localhost'
-NEWS_PROXY='https://news.localhost'
 
-# You can get a webhook proxy url from smee.io
+# ---------------------
+# Debugging Mode Keys
+# ---------------------
+PEER=stuff
+DEBUG=true
+LOCAL_MOCK_AUTH=true
+# Webhook proxy url from smee.io for PayPal
 WEBHOOK_PROXY_URL=''
-
-LOCALE=english
-
+# Docker Setup
 DOCKER_HOST_LOCATION=localhost
-
-GHOST_CLIENT_KEY=123abc
-
-SENTRY_DSN=dsn_from_sentry_dashboard
-SENTRY_ENVIRONMENT='staging'
-
-# Set this to false to see what the production site will contain
-SHOW_HIDDEN=true
+COMPOSE_PROJECT_NAME=freecodecamp