Deploying InfluxDB 3 Explorer UI

# Deploying InfluxDB 3 Explorer UI

## Finding
The answers could not provide a native installer, an official docker-compose.yml, or even consistent confirmation that an Explorer/UI image exists, leaving users unsure whether Explorer is Docker-only and how to launch it with Compose beside InfluxDB 3.

## Suggestion
Add clear docs stating Explorer is the official UI, list its Docker image, provide a ready-to-use docker-compose.yml (with ports, volumes, environment settings), and explicitly note that no non-Docker distribution currently exists or outline forthcoming options.

## Conversations
- InfluxDB 3 Explorer目前只能使用docker安装吗
- please locate docke compose file for infludb explorere
- influxdb3:
image: influxdb:3-core
container_name: influxdb3
restart: unless-stopped
ports:
- "8086:8181" # 宿主机 8086 → 容器内 8181（InfluxDB3 HTTP 接口）
environment:
- INFLUXDB_IOX_GC_OBJECTSTORE_CUTOFF=3h
- INFLUXDB_IOX_GC_PARQUETFILE_CUTOFF=3h
volumes:
- influxdb3_data:/var/lib/influxdb3
command: >
influxdb3 serve
--node-id my_node
--object-store file
--data-dir /var/lib/influxdb3 我已经docker compose启动了influxdb3，如果增加influxdb3-ui启动
- docker compose for influxdb3-explorer

–––
Explore user conversations on:
https://app.kapa.ai/720100f9-ce93-4305-88fd-5fcf71effad7/coverage-gaps/clusters/18f3fe36-bc18-4cf9-a729-81fa157bf873

Start by reviewing the linked user conversations and the existing InfluxDB 3 deployment documentation to verify Explorer's official image and supported distribution. Document Explorer as the official UI, provide a tested docker-compose.yml with the requested ports, volumes, and environment settings, and state whether non-Docker installation is available.

Written by the indexing model from the issue text.