chore: update README

README.md

@@ -2,3 +2,36 @@
 RPG Using Language Models As Realistic Characters
 
 An experiment to see how LLMs can be useful to make believable characters in role-playing games.
+
+## Build instructions
+
+### Nix machines with devenv
+
+1. Clone the project.
+2. Enter the project directory.
+3. Enter the following command:
+```
+$ devenv shell
+```
+4. In the shell, run:
+```
+$ build
+```
+5. You will find the build artifact in the ./bin/ directory.
+
+### Other machines
+
+1. Install Go.
+2. Clone the project.
+3. Run the following command:
+```
+$ go build -o ./bin/
+```
+4. You will find the build artifact in the ./bin/ directory.
+
+## Notes
+
+This project is in a pre-pre-pre-alpha state.  
+It should not yet be considered usable.  
+
+Currently in active development