Documentation: fix openwrt docs (#3016)

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/services/openwrt.md

@@ -26,29 +26,35 @@ In order for homepage to access the OpenWRT RPC endpoints you will need to [crea
 
 Create an ACL named `homepage.json` in `/usr/share/rpcd/acl.d/`, the following permissions will suffice:
 
-```
+```json
 {
-        "homepage": {
-                "description": "Homepage widget",
-                "read": {
-                        "ubus": {
-                                "network.interface.wan": ["status"],
-                                "network.interface.lan": ["status"],
-                                "network.device": ["status"]
-                                "system": ["info"]
-                        }
-                },
-        }
+  "homepage": {
+    "description": "Homepage widget",
+    "read": {
+      "ubus": {
+        "network.interface.wan": ["status"],
+        "network.interface.lan": ["status"],
+        "network.device": ["status"],
+        "system": ["info"]
+      }
+    }
+  }
 }
 ```
 
-Then add a user that will use that ACL in `/etc/config/rpc`:
+Create a `crypt(5)` password hash using the following command in the OpenWRT shell:
+
+```sh
+uhttpd -m "<somepassphrase>"
+```
 
-```config login
+Then add a user that will use the ACL and hashed password in `/etc/config/rpcd`:
+
+```
+config login
         option username 'homepage'
-        option password '<password>'
+        option password '<hashedpassword>'
         list read homepage
-        list write '*'
 ```
 
 This username and password will be used in Homepage's services.yaml to grant access.