feat: add production env sample

.env.prod.sample

@@ -0,0 +1,46 @@
+HOST=localhost
+PORT=3000
+BASE_URL=https://example.com
+SECRET_KEY=YOU_SHOULD_CHANGE_THIS
+BACKEND_URL=http://backend:3000
+
+MONGO_ROOT_PASSWORD=adminpassword
+MONGO_USER=commander
+MONGO_PASS=commander
+MONGO_DB=linux-odyssey
+
+# Admin user credentials for analytics
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=admin
+
+# Optional
+# CONTAINER_EXPIRY=60     # 60 minutes
+# SESSION_MAX_AGE=168      # 7 days
+# TRUSTED_PROXIES=1.2.3.4    
+# valid configurations see isIP & isIPRange in  https://github.com/validatorjs/validator.js?tab=readme-ov-file#validators
+
+# GOOGLE_CLIENT_ID=
+# GOOGLE_CLIENT_SECRET=
+# GITHUB_CLIENT_ID=
+# GITHUB_CLIENT_SECRET=
+# SURVEY_URL=
+# BUG_REPORT_URL=
+# DOCKER_NETWORK=
+
+# SURVEY_URL=
+# BUG_REPORT_URL=
+
+# Docker related config
+# DOCKER_NETWORK=host
+# QUEST_IMAGE=linuxodyssey/quest-base
+# DOCKER_PREFIX=linuxodyssey/quest-
+
+# To mount quest folder from host into container, for development purpose
+# MOUNT_QUEST=true
+
+# LOG_PATH=
+
+# Testing, create a user with the following credentials, disable rate limiting
+# TESTING=true
+# TESTING_USERNAME=alex
+# TESTING_PASSWORD=Alex1234