Preflight Request, According to the definition on MDN , "A CORS preflight request is a CORS request that checks to see if the CORS protocol is underst  ... Read more

On Linux system, ports below 1024 are reserved for programs with root privilege. There are several ways to allow regular users to bind these privileged  ... Read more

As stated in The Effective Go : "Slices hold references to an underlying array, and if you assign one slice to another, both refer to the same array. I  ... Read more

You can use "docker save" command to save a docker image to file. docker save -o </path/to/filename> <image_name> You can also load a docker image f  ... Read more

In Virtualbox guest, open setting->network setting->port forwarding, Add a new Rule: change the "Host port" to the port you want to use as forwarding,  ... Read more