Modern HVAC relies heavily on the use of refrigerants. But they are under strict legislative supervision. Create an application to help clients and HVAC technicians with legislative requirements. Explore the legislative requirements and propose the right features to fulfil them. A technician can use this application as a service book. He can add information about device, service entries, plan periodical tests, and others. Client can check information about his device and request periodical test in the application. Implement the application as a web application using React and Typescript.