fix: kill stale port holders before docker run (#109)

The old `dap-bootstrap` Node.js process holds port 8099 even after
`docker rm awn-gateway`, causing `docker run` to fail with *address
already in use*. Adding `fuser -k 8099/tcp` and `8100/tcp` before the
run clears any leftover listeners.

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Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

Author: Jing-yilin

.github/workflows/deploy-gateway.yml

@@ -64,6 +64,8 @@ jobs:
               $pull,
               "docker stop awn-gateway 2>/dev/null || true",
               "docker rm awn-gateway 2>/dev/null || true",
+              "fuser -k 8099/tcp 2>/dev/null || true",
+              "fuser -k 8100/tcp 2>/dev/null || true",
               $run
             ]}')