The Preliminary Architecture Diagram illustrates the flow of information from a website to a PostgreSQL database via a NodeJS server. At the system's front end, the website collects data from users and sends it to the NodeJS server, which acts as an intermediary between the website and the database. The NodeJS server processes the data and performs any necessary validation before passing it on to the PostgreSQL database, where it is stored and can be queried or modified as needed. The PostgreSQL database is configured to handle large volumes of data and provides robust and scalable data management capabilities. Overall, the Preliminary Architecture Diagram presents a simple and efficient system architecture that can support a variety of web-based applications and services. Create a similar diagram using EdrawMax. Once you have customized the EdrawMax template, you can share it in different formats per your requirements.