Some instructions in the readme

README.md

@@ -1,2 +1,15 @@
 # aldi-pixel-font
 Generate very small pixel fonts for PC-8k intros.
+
+# Features
+![image](https://user-images.githubusercontent.com/7655767/208553227-d00df40b-f2fb-4ca6-8951-11f156e2162b.png)
+
+See the font in action: https://www.shadertoy.com/view/dtfGz7
+
+# Building
+* Download and install Python; add it and its script directory to your system PATH.
+* Download and install CMake and git; add their binary dirs to your system PATH.
+* Clone this repository, create an out-of-source build directory and cd there.
+* `cmake [SOURCE_ROOT] -DCMAKE_INSTALL_PREFIX=install`
+* `cmake --build . --config Release --target install`
+* Enjoy.