Add: hacking instructions to README.md

1 files changed, 10 insertions, 1 deletions

diff --git a/README.md b/README.md
index dcd5a88..d3156e9 100644
--- a/README.md
+++ b/README.md
@@ -19,9 +19,18 @@ the project’s acceptance criteria and how they’re verified.
 
 See <https://subplot.liw.fi/> for the home page.
 
+## Hacking Subplot
+
+Subplot is written using the Rust programming language, so the usual
+workflow for Rust applies. To build run `cargo build`, to run tests in
+Rust run `cargo test`.
+
+To run the whole test suite, including testing all examples and
+Subplot self tests, run `./check` at the root of the source tree.
+
 # Legalese
 
-Copyright 2019  Lars Wirzenius
+Copyright 2019-2020  Lars Wirzenius
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by