New act runner run in docker lead to error 500 on server

gistfile1.txt

Runner logs:

time="2023-10-11T08:48:01Z" level=info msg="Starting runner daemon"
time="2023-10-11T08:48:01Z" level=warning msg="Because the Gitea instance is an old version, skip declare labels and version."
time="2023-10-11T08:48:01Z" level=error msg="failed to fetch task" error="unknown: rpc error: code = Unauthenticated desc = unregistered runner"
...


Server logs:

2023/10/11 12:42:15 ...s/graceful/server.go:62:NewServer() [I] Starting new Web server: tcp:0.0.0.0:3000 on PID: 15
2023/10/11 12:42:21 ...eb/routing/logger.go:68:func1() [I] router: polling   GET /user/events for <ip>:64528, elapsed 3536.7ms @ events/events.go:18(events.Events)
2023/10/11 12:42:28 ...eb/routing/logger.go:102:func1() [I] router: completed POST /api/actions/runner.v1.RunnerService/Declare for <ip>:51638, 404 Not Found in 0.1ms @ <autogenerated>:1(http.Handler.ServeHTTP-fm)
2023/10/11 12:42:28 ...eb/routing/logger.go:102:func1() [I] router: completed POST /api/actions/runner.v1.RunnerService/FetchTask for <ip>:51638, 500 Internal Server Error in 2.4ms @ <autogenerated>:1(http.Handler.ServeHTTP-fm)

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