update readme

README.md

@@ -2,5 +2,27 @@
 
 This package contains the SHA256 hashing interface, formerly in the Noir standard library.
 
-> WIP
+## Noir Version Compatibility
 
+This library is tested to work as of Noir v0.36.0.
+
+## Benchmarks
+
+Benchmarks are ignored by `git` and checked on pull-request. As such, benchmarks may be generated
+with the following command.
+
+```bash
+# execute the following
+./scripts/build-gates-report.sh
+```
+
+The benchmark will be generated at `./gates_report.json`.
+
+## Installation
+
+In `Nargo.toml`, add the version of this library desired to install the dependency:
+
+```toml
+[dependencies]
+sha256 = { tag = "v0.1.0", git = "https://github.com/noir-lang/sha256" }
+```