fix:Resolve the issue of Docker startup documents being queued all th… (#10791)

docker/.env.example

@@ -49,7 +49,7 @@ FILES_URL=
 # Supported values are `DEBUG`, `INFO`, `WARNING`, `ERROR`, `CRITICAL`
 LOG_LEVEL=INFO
 # Log file path
-LOG_FILE=
+LOG_FILE=/app/logs/server.log
 # Log file max size, the unit is MB
 LOG_FILE_MAX_SIZE=20
 # Log file max backup count
@@ -916,4 +916,4 @@ POSITION_PROVIDER_EXCLUDES=
 CSP_WHITELIST=
 
 # Enable or disable create tidb service job
-CREATE_TIDB_SERVICE_JOB_ENABLED=false
+CREATE_TIDB_SERVICE_JOB_ENABLED=false