Added development environment dockerfile and requirements file

[salonee13]

What changes were proposed in this pull request?

Added two lines checking for node version and yarn version, this would make it easier for people down the line while they are in the process of installing and setting up the elyra environment to check to see if they have the right version of node and yarn installed.

How was this pull request tested?

We would start up the container and run make install, if everything ran smoothly and the command ran with no errors we can assume we had node and yarn properly installed.

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[akchinSTC]

Lets update the description as well to something well...more descriptive...lol
We want to let people know what they are getting with this new pull request(no need to describe the changes) hint: its what @salonee13 had said during our webex, making things easier for people down the line.
Also how did we test this, its absolutely fine to say we just started up the container with the image and tried running make install but you should elaborate more.

Updates to documentation:
We also want to update the docs to reflect how people can use this new image. Take a look at docs/source/developer_guide/development-workflow.md. We probably want to update the requirements section with an OR and add this image as an option for use.
Also lets add another section that describes how to start the container and map the correct directories to the container e.g. the docker run .... cmd I gave you.