fix:simplify example env

.env.example

@@ -9,6 +9,14 @@ APP_PORT=8000
 SELF_HOSTED=true
 REGISTRATION_ENABLED=true
 
+OPENAI_API_KEY=
+OPENAI_ORGANIZATION=
+
+MARKET_DATA_PROVIDER=yahoo
+MARKET_DATA_REFRESH=30
+ALPHAVANTAGE_API_KEY=
+FINNHUB_API_KEY=
+
 ENABLED_LOGIN_PROVIDERS= 
 GITHUB_CLIENT_ID=
 GITHUB_CLIENT_SECRET=
@@ -23,14 +31,6 @@ APP_LOCALE=en
 APP_FALLBACK_LOCALE=en
 APP_FAKER_LOCALE=en_US
 
-APP_MAINTENANCE_DRIVER=file
-
-BCRYPT_ROUNDS=12
-
-LOG_CHANNEL=stack
-LOG_STACK=single
-LOG_DEPRECATIONS_CHANNEL=null
-LOG_LEVEL=debug
 
 DB_CONNECTION=mysql
 DB_HOST=investbrain-mysql
@@ -45,14 +45,10 @@ SESSION_ENCRYPT=false
 SESSION_PATH=/
 SESSION_DOMAIN=null
 
-BROADCAST_CONNECTION=log
 FILESYSTEM_DISK=local
 QUEUE_CONNECTION=redis
 
 CACHE_STORE=redis
-CACHE_PREFIX=
-
-MEMCACHED_HOST=127.0.0.1
 
 REDIS_CLIENT=predis
 REDIS_HOST=127.0.0.1
@@ -69,11 +65,6 @@ MAIL_ENCRYPTION=null
 MAIL_FROM_ADDRESS="hello@example.com"
 MAIL_FROM_NAME="${APP_NAME}"
 
-MARKET_DATA_PROVIDER=yahoo
-MARKET_DATA_REFRESH=30
-ALPHAVANTAGE_API_KEY=
-FINNHUB_API_KEY=
-
 AWS_ACCESS_KEY_ID=
 AWS_SECRET_ACCESS_KEY=
 AWS_DEFAULT_REGION=us-east-1