The `apk` commands can utilize the `--no-cache` option, making the
`update` step superfluous and ensuring the latest packages are used
without maintaining a local cache. An additional `apk update` in the
Dockerfile will just make the image larger with no benefits.
Remove unnecessary `apk update` and manual cache cleanup steps in the
Alpine Dockerfile. By using `apk add --no-cache`, we avoid manual cache
management, making the Dockerfile simpler and easier to maintain.
