Error while dialing dial tcp 127.0.0.1:2379: connect: connection refused

Command: go run check.go -f etc/check.yaml

Output:
Starting rpc server at 0.0.0.0:8080...
{"level":"warn","ts":"2022-12-27T19:20:55.154-0800","logger":"etcd-client","caller":"v3@v3.5.5/retry_interceptor.go:62","msg":"retrying of unary invoker failed","target":"etcd-endpoints://0x14000290380/127.0.0.1:2379","attempt":0,"error":"rpc error: code = DeadlineExceeded desc = latest balancer error: last connection error: connection error: desc = "transport: Error while dialing dial tcp 127.0.0.1:2379: connect: connection refused""}
{"@timestamp":"2022-12-27T19:20:55.155-08:00","caller":"zrpc/server.go:91","content":"context deadline exceeded","level":"error"}
panic: context deadline exceeded

goroutine 1 [running]:
github.com/zeromicro/go-zero/zrpc.(*RpcServer).Start(0x1027e6bc0?)
{HOME}go/pkg/mod/github.com/zeromicro/go-zero@v1.4.3/zrpc/server.go:92 +0x80
main.main()
{HOME}/Desktop/myapp/bookstore/rpc/check/check.go:38 +0x228
exit status 2

Reproduce the issue with go run check.go -f etc/check.yaml and start at check.go:38, where the RPC server start fails. Inspect the configured endpoint shown in the output, 127.0.0.1:2379, and compare it with the service setup described by the repository. Done means the command starts successfully or the required configuration and startup steps are documented.