As the Internet becomes more prevalent in everyday life, so does the use of web applications. Increasing competition in web application development has encouraged the development of numerous web application development frameworks. They enable faster, simpler and more flexible application development and maintenance. One such framework that provides fast and flexible development is Blazor. Unlike most frameworks, it provides the possibility of complete implementation of the business logic of the client and server part of the web application using the C# programming language. Real-time communication achieved with the SignalR library, Blazor Server and Blazor WebAssembly web application execution models allow developers to use several different solutions for web application needs. In addition to Blazor, the Docker runtime environment for containerizing provides simplification during web application development. As containers contain all the necessary executable files, binary code, libraries and configuration files to run a containerized application, developers do not have to take care of the versions of frameworks and libraries on their computers, but simply run the applications. The paper will describe classic application development, the Blazor framework, the Docker runtime environment and the database system, and finally the practical part in the form of an application developed using the technologies described in the theoretical part.