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/flink/docker-compose.yaml

@@ -0,0 +1,78 @@
+x-default: &default
+  restart: unless-stopped
+  logging:
+    driver: json-file
+    options:
+      max-size: 100m
+      max-file: "3"
+
+services:
+  jobmanager:
+    <<: *default
+    image: flink:${FLINK_VERSION:-1.20.0-scala_2.12-java11}
+    hostname: jobmanager
+    command: jobmanager
+    environment:
+      TZ: ${TZ:-UTC}
+      FLINK_PROPERTIES: |
+        jobmanager.rpc.address: jobmanager
+        jobmanager.memory.process.size: 1600m
+        taskmanager.memory.process.size: 1600m
+        taskmanager.numberOfTaskSlots: 2
+    volumes:
+      - flink_data:/opt/flink/data
+      # Custom Flink jobs
+      # - ./jobs:/opt/flink/jobs
+    ports:
+      - "${FLINK_JOBMANAGER_RPC_PORT_OVERRIDE:-6123}:6123"
+      - "${FLINK_JOBMANAGER_UI_PORT_OVERRIDE:-8081}:8081"
+    deploy:
+      resources:
+        limits:
+          cpus: '2.0'
+          memory: 2G
+        reservations:
+          cpus: '0.5'
+          memory: 1G
+    healthcheck:
+      test: ["CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:8081 || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+
+  taskmanager:
+    <<: *default
+    image: flink:${FLINK_VERSION:-1.20.0-scala_2.12-java11}
+    command: taskmanager
+    environment:
+      TZ: ${TZ:-UTC}
+      FLINK_PROPERTIES: |
+        jobmanager.rpc.address: jobmanager
+        jobmanager.memory.process.size: 1600m
+        taskmanager.memory.process.size: 1600m
+        taskmanager.numberOfTaskSlots: 2
+    volumes:
+      - flink_data:/opt/flink/data
+      # Custom Flink jobs
+      # - ./jobs:/opt/flink/jobs
+    depends_on:
+      jobmanager:
+        condition: service_healthy
+    deploy:
+      resources:
+        limits:
+          cpus: '2.0'
+          memory: 2G
+        reservations:
+          cpus: '0.5'
+          memory: 1G
+    healthcheck:
+      test: ["CMD-SHELL", "ps aux | grep -v grep | grep -q taskmanager || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+
+volumes:
+  flink_data: