Add environment configuration and documentation for various services

- Created .env.example files for Kafka, Kibana, KodBox, Kong, Langfuse, Logstash, n8n, Nginx, OceanBase, OpenCoze, RocketMQ, TiDB, and TiKV.
- Added README.md and README.zh.md files for OceanBase, RocketMQ, TiDB, and TiKV, detailing usage, configuration, and access instructions.
- Implemented docker-compose.yaml files for OceanBase, RocketMQ, TiDB, and TiKV, defining service configurations, health checks, and resource limits.
- Included broker.conf for RocketMQ to specify broker settings.
- Established a consistent timezone (UTC) across all services.
- Provided optional port overrides in .env.example files for flexibility in deployment.

src/logstash/.env.example

@@ -0,0 +1,30 @@
+# Logstash version
+LOGSTASH_VERSION=8.16.1
+
+# Timezone
+TZ=UTC
+
+# Elasticsearch connection
+ELASTICSEARCH_HOSTS=http://elasticsearch:9200
+ELASTICSEARCH_USERNAME=
+ELASTICSEARCH_PASSWORD=
+
+# Monitoring
+LOGSTASH_MONITORING_ENABLED=false
+
+# JVM options
+LS_JAVA_OPTS=-Xmx1g -Xms1g
+
+# Pipeline configuration
+LOGSTASH_PIPELINE_WORKERS=2
+LOGSTASH_PIPELINE_BATCH_SIZE=125
+LOGSTASH_PIPELINE_BATCH_DELAY=50
+
+# Logging
+LOGSTASH_LOG_LEVEL=info
+
+# Port overrides (optional)
+# LOGSTASH_BEATS_PORT_OVERRIDE=5044
+# LOGSTASH_TCP_PORT_OVERRIDE=5000
+# LOGSTASH_UDP_PORT_OVERRIDE=5000
+# LOGSTASH_HTTP_PORT_OVERRIDE=9600