Add some stuff to the readme

README.md

@@ -1,2 +1,30 @@
-# meson-build
+# Meson Build action
+[![Test](https://github.com/BSFishy/meson-build/workflows/Test/badge.svg)](https://github.com/BSFishy/meson-build/actions)
+
 Run a Meson task during your Actions workflow
+
+## Usage
+See [action.yml](action.yml)
+
+Basic:
+```yaml
+steps:
+- uses: actions/checkout@v2
+- uses: actions/setup-python@v1
+- uses: BSFishy/meson-build@v1
+  with:
+    action: test
+```
+
+All options:
+```yaml
+- uses: BSFishy/meson-build@v1
+  with:
+    action: test
+    directory: build
+    setup-options: -Db_coverage=true
+    options: --verbose
+    meson-version: 0.53.2
+    ninja-version: 1.9.0.post1
+    gcovr-version: 4.2
+```