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/oceanbase/README.md

@@ -0,0 +1,51 @@
+# OceanBase
+
+OceanBase is a distributed relational database developed by Ant Group. It features high availability, high scalability, and is compatible with MySQL.
+
+## Usage
+
+```bash
+docker compose up -d
+```
+
+## Configuration
+
+Key environment variables:
+
+- `OB_ROOT_PASSWORD`: Root user password (default: `oceanbase`)
+- `OB_TENANT_NAME`: Tenant name (default: `test`)
+- `OB_TENANT_PASSWORD`: Tenant password (default: `oceanbase`)
+- `OB_MEMORY_LIMIT`: Memory limit (default: `8G`, minimum: `8G`)
+- `OB_DATAFILE_SIZE`: Data file size (default: `10G`)
+- `OB_LOG_DISK_SIZE`: Log disk size (default: `6G`)
+
+## Ports
+
+- `2881`: MySQL protocol port
+- `2882`: RPC port
+
+## Connection
+
+Connect using MySQL client:
+
+```bash
+mysql -h127.0.0.1 -P2881 -uroot@test -poceanbase
+```
+
+Or connect to sys tenant:
+
+```bash
+mysql -h127.0.0.1 -P2881 -uroot -poceanbase
+```
+
+## Notes
+
+- OceanBase requires at least 8GB of memory to run properly
+- First startup may take several minutes to initialize
+- Use `slim` mode for development/testing environments
+- For production, consider using `normal` mode and a dedicated cluster
+
+## References
+
+- [OceanBase Official Documentation](https://www.oceanbase.com/docs)
+- [OceanBase Docker Hub](https://hub.docker.com/r/oceanbase/oceanbase-ce)