[DOCS] Add sitemap (#1868)

docs/.vuepress/config.js

@@ -107,4 +107,20 @@ module.exports = {
       }
   ]
   }
+  plugins: {
+    'sitemap': {
+      hostname: 'https://docs.openmqttgateway.com',
+      urls: [
+        'https://decoder.theengs.io/devices/devices.html',
+        'https://community.openmqttgateway.com/',
+        'https://shop.theengs.io/',
+        'https://shop.theengs.io/products/theengs-plug-smart-plug-ble-gateway-and-energy-consumption',
+        'https://shop.theengs.io/products/theengs-bridge-esp32-ble-mqtt-gateway-with-ethernet-and-external-antenna',
+        'https://app.theengs.io/',
+        'https://gateway.theengs.io/',
+        'https://decoder.theengs.io/',
+        'https://parser.theengs.io/',
+        'https://www.theengs.io/'
+      ],
+    },
 }

package.json

@@ -5,5 +5,8 @@
   },
   "devDependencies": {
     "vuepress": "^1.9.10"
+  },
+  "dependencies": {
+    "vuepress-plugin-sitemap": "^2.3.1"
   }
 }