Create node.js app that loads fabrick json and saves as image

Some background. I have a website where users can build their own custom image online, upload image, text, barcode etc. This tool was build using fabric.js. Site is available online and I can provide link for interested bidders. The idea of the application is that; node.js script will run independently of hours, read saved json files; that represent user image; create png of it and saves to a disk. User story. As a node application, i need to load canvas and build all elements from json, once loaded save canvas to png image. I will provide: - examples of several json files - starter application; I started working on this but I have stuck on one issue that I need help with. Currently, application do build canvas and saves to an image but I'm having problems with clipping of an image. - any current code for a site that might be helpful to finish task Requirements: Node.js must use fabric to build and load canvas. Image created must much exactly image that I will provide, that includes custom fonts.