Add a developer README

src/README.md

@@ -0,0 +1,22 @@
+# WinSoftVol developer documentation
+
+[![.github/workflows/continuous-integration.yml](https://github.com/dechamps/WinSoftVol/actions/workflows/continuous-integration.yml/badge.svg)](https://github.com/dechamps/WinSoftVol/actions/workflows/continuous-integration.yml)
+
+WinSoftVol is designed to be built using CMake within the Microsoft Visual C++
+2019 toolchain native CMake support.
+
+Make sure to clone the Git repo *with submodules*.
+
+You will need to have the [Windows Driver Kit][] installed. Any version will
+likely work.
+
+The build process also requires OpenSSL but that's only for driver signing
+purposes. If you have [vcpkg][] set up, it will automatically build OpenSSL as a
+dependency of WinSoftVol. Otherwise, you can manually provide `openssl.exe`;
+just make sure it's somewhere CMake will find it.
+
+With that out of the way, building WinSoftVol should be as simple as opening the
+`src` folder in Visual Studio 2019 and hitting Build.
+
+[vcpkg]: https://vcpkg.io/
+[Windows Driver Kit]: https://docs.microsoft.com/en-us/windows-hardware/drivers/download-the-wdk