Add doc for garage, rename example as instrumented

README.md

@@ -14,3 +14,21 @@ sudo python3 main.py run-all example/deploy_garage.sh
 sudo python3 main.py run dc1:dc1s1 garage -c /tmp/garage-testnet/dc1/dc1s1/garage.toml status
 sudo python3 main.py destroy
 ```
+
+## Instrumented daemons
+
+If you want to use the scripts provided in the `instrumented` folder,
+you must add to your path some tools
+
+### Garage (`deploy_garage.sh`)
+
+```bash
+# see versions on https://garagehq.deuxfleurs.fr/_releases.html
+export GRG_ARCH=x86_64-unknown-linux-musl
+export GRG_VERSION=v0.5.0
+
+sudo wget https://garagehq.deuxfleurs.fr/_releases/${GRG_VERSION}/${GRG_ARCH}/garage -O /usr/local/bin/garage
+sudo chmod +x /usr/local/bin/garage
+
+garage help
+```