add how to memo

Author: takara9

docs/how_to_install_collector.md

@@ -0,0 +1,50 @@
+How to install collector command
+=====================================
+
+The collector command can run in setup-hw container and bare metal linux server. 
+in this memo describe how to install bare metal server.
+
+## 1.Clone code from github repository
+
+```
+$ git clone https://github.com/cybozu-go/setup-hw
+```
+
+## 2.Build & install collector command
+
+```
+$ cd setup-hw
+$ make install
+```
+
+## 3.Setup config
+
+Put a bmc-user.json file in /etc/neco/ that must have "support" user due to use the collector command.
+
+```
+{
+  "support": {
+    "password": {
+      "raw": "cybozu"
+    }
+  }
+}
+```
+
+Put a bmc-address.json file in /etc/neco. 
+
+```
+{"ipv4":{"address":"10.210.152.197","netmask":"255.255.252.0","maskbits":22,"gateway":"10.210.152.198"}}
+```
+
+please see [config.md]("config.md") file.
+
+## 4.Check 
+
+By following the above steps, you can execute the collector command.
+
+```
+$ collector show
+```
+
+Next, see [how to generate rules](how_to_install_collector.md).