Update readme for Gulp build process and fix build

README.md

@@ -45,6 +45,7 @@ Jellyfin Web is the frontend used for most of the clients available for end user
 ### Dependencies
 
 - Yarn
+- Gulp-cli
 
 ### Getting Started
 
@@ -60,5 +61,14 @@ Jellyfin Web is the frontend used for most of the clients available for end user
 
 3. Run the web client with webpack for local development.
    ```sh
-   yarn serve
+   gulp serve
    ```
+
+4. Build the client with sourcemaps.
+   '''sh
+   gulp
+   '''
+   Or without sourcemaps
+   '''sh
+   gulp --production
+   '''

package.json

@@ -19,6 +19,7 @@
     "file-loader": "^5.0.2",
     "gulp": "^4.0.2",
     "gulp-babel": "^8.0.0",
+    "gulp-cli": "^2.2.0",
     "gulp-concat": "^2.6.1",
     "gulp-htmlmin": "^5.0.1",
     "gulp-imagemin": "^7.1.0",
@@ -68,9 +69,7 @@
   },
   "babel": {
     "presets": [
-      [
-        "@babel/preset-env"
-      ]
+      "@babel/preset-env"
     ]
   },
   "browserslist": [
@@ -93,6 +92,6 @@
     "build": "gulp --production",
     "build-dev": "gulp",
     "lint": "eslint \"src\"",
-    "stylelint": "stylelint \"src/**/*.css\"",
+    "stylelint": "stylelint \"src/**/*.css\""
   }
 }