Add option to customize height and width of the certificate

[jatinkatyal13]

Currently, the certificates generated have the fixed height and width of an A4 size paper. Users should be able to store height and width in pixels beside each layout.

To start

• Setup MongoDB and Rabbitmq
• Go to https://account.codingblocks.com and create a client with callback url = "http://localhost:8080/oneauth/callback"
• Export following environment variables
  • login: rabbitmq username
  • password: rabbitmq password
  • DB_URL: mongodb connection string
  • CLIENT_ID: oneauth client ID
  • CLIENT_SECRET: oneauth client secret

ToDo

Backend

• In file src/services/layouts/schema.js change UPDATE and CREATE schema to accept height and width in the body
• In file src/plugins/worker/handler.js:82 update the pdf document opts to use the height and width from the layout and use the current as default

Frontend

• In file frontend/components/layouts/LayoutEditor.js update the component to incorporate height and width input.
• Also change the ASPECT RATIO of the preview on the right when the user changes height and width.