@PostMapping("")
    public ShenyuAdminResult createDiscoveryUpstream(@Valid @RequestBody final DiscoveryUpstreamDTO discoveryUpstreamDTO) {
        return ShenyuAdminResult.success(discoveryUpstreamService.createOrUpdate(discoveryUpstreamDTO));
    }
create discovery upstream.

@param discoveryUpstreamDTO discoveryUpstreamDTO
@return {@linkplain ShenyuAdminResult}
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/DiscoveryUpstreamController.java