Ship default .sh scripts for running the image in the correct way.

[DanieleVistalli]

In a "bin" folder we need to place the bash script files that will act as helper for running tools inside the image.

as of today we can define "wsadmin.sh" as an helper to invoke the image tooling like this.

docker run -it --rm tool-dx: -v ./:/ --

This is intended to "pass" to the container the current working directory as a mounted volume so that local scripts can be mapped to the container for loading/executing inside the containerized wsadmin

Ideally the wsadmin.sh script could do some sanity check and have placeholders for setting the tooling image name to be used.