initialize a backend project (to store user information, app information etc.)

[VigneshVSV]

Currently the project is frontend only. But soon we will have many functions (based on user management) that will convert the project to fullstack. Create a new folder backend for a PERN stack project:

Rough steps:

• move the frontend into a folder and rewire the CI job to use the frontend within the folder.
• The express app should have one endpoint fetching some dummy information and be connected to a database successfully (using sequelize ORM). A dummy open API specification and a swagger UI must be available.
• A docker image build for the backend is integrated into CI
• backend is deployed into kubernetes cluster (ask for credentials) using CI job