[PR] Fix docker-compose quickstart for Horizon UI and OAP healthcheck [skywalking]

["wu-sheng (via GitHub)" <gi...@apache.org>]

wu-sheng opened a new pull request, #13899:
URL: https://github.com/apache/skywalking/pull/13899

   ### Fix docker-compose quickstart issues reported in #13896
   
   The docker-compose quickstart had three problems that surfaced when a user tried the Horizon UI with a mounted `horizon.yaml`:
   
   1. **OAP healthcheck used `curl`**, which isn't present in the `eclipse-temurin` JRE image — the healthcheck never ran. Replaced with bash's built-in `/dev/tcp` port probe (no extra binary), and widened `start_period` to `90s` so BanyanDB schema install during boot doesn't consume the retry budget.
   2. **Horizon UI port mapping was wrong** — Horizon listens on `8081` inside the container, but compose mapped `8080:8080`. Fixed to `8080:8081`.
   3. **Horizon backend wiring used non-existent env vars** (`SW_OAP_ADDRESS` / `SW_ADMIN_ADDRESS` / `SW_ZIPKIN_ADDRESS`). The image reads OAP URLs and login users **only** from its config file. Now mounts a new `docker/horizon.yaml` with `server.host: 0.0.0.0` (the upstream example ships `127.0.0.1`, which binds container-loopback only and 503s from the host — the original report), OAP query/admin/zipkin URLs pointed at the compose `oap` service, and a demo `admin`/`admin` local login.
   
   - [x] Explain briefly why the bug exists and how to fix it.
   
   - [x] If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes #13896.
   - [x] Update the [`CHANGES` log](https://github.com/apache/skywalking/blob/master/docs/en/changes/changes.md).


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Re: [PR] Fix docker-compose quickstart for Horizon UI and OAP healthcheck [skywalking]

["wu-sheng (via GitHub)" <gi...@apache.org>]

wu-sheng merged PR #13899:
URL: https://github.com/apache/skywalking/pull/13899


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