To write server apps in Swift, we require an understanding of where Swift comes from and how it fits into the world of server languages. Swift was invented by Apple engineers as an alternative to C-derivatives, for example, C++, and, Objective-C, Objective-C++. After initially keeping Swift proprietary Apple then released Swift as open source for macOS and Linux. You might have wondered why Apple would bother to make Swift available on Linux, as Apple doesn't usually release any Linux products (not even iTunes).
Swift was designed to be a native language from the very beginning. It means an application gets compiled into binary code that runs directly on the processor, making it the fastest way for an application to run.
When Apple released Swift for Linux, there was little application. The UI was still functioning only on Apple devices, but a good...