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/halo/.env.example

@@ -0,0 +1,22 @@
+# Halo version
+HALO_VERSION=2.21.9
+
+# Timezone
+TZ=UTC
+
+# Halo port
+HALO_PORT=8090
+
+# External URL (should match your domain)
+HALO_EXTERNAL_URL=http://localhost:8090
+
+# Admin credentials
+HALO_ADMIN_USERNAME=admin
+# HALO_ADMIN_PASSWORD=  # Leave empty for random password on first start
+
+# Database configuration
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_DB=halo
+SPRING_R2DBC_URL=r2dbc:pool:postgresql://halo-db:5432/halo
+SPRING_SQL_INIT_PLATFORM=postgresql