Build script and instructions (#270)

Build script and instructions + minor cleanups

README.md

@@ -40,3 +40,16 @@ gauge.js can be wrapped to a number of frameworks. Here are some examples:
 
 * **Vue**
   * [vgauge](https://github.com/amroessam/vgauge)
+* **React**
+  * [react-gaugejs](https://github.com/keanemind/react-gaugejs)
+
+## Build instructions
+
+Build is a two-step process. First, the CoffeeScript source `gauge.coffee` is converted to `gauge.js`. Next, [terser](https://www.npmjs.com/package/terser) produces the minified distribution file `gauge.min.js`.
+
+```bash
+# Install development dependencies
+npm install
+# Run the build
+npm run build
+```

index.html

@@ -96,7 +96,7 @@ <h2>Features</h2>
   <li>No dependencies (jQuery is <a href="#jquery">supported</a>, but not required)</li>
   <li>Highly configurable</li>
   <li>Resolution independent</li>
-  <li>Animated guage value changes (!)</li>
+  <li>Animated gauge value changes (!)</li>
   <li>Works in all major browsers</li>
   <li>MIT License</li>
 </ul>

package.json

@@ -8,5 +8,14 @@
     "url": "[email protected]:bernii/gauge.js.git"
   },
   "author": "bernii",
-  "license": "MIT"
+  "license": "MIT",
+  "devDependencies": {
+    "coffeescript": "^1.12.7",
+    "terser": "^5.27.1"
+  },
+  "scripts": {
+    "build:coffee": "coffee -c -m -o ./dist/ ./dist",
+    "minify": "terser ./dist/gauge.js -m -o ./dist/gauge.min.js -c",
+    "build": "npm run build:coffee && npm run minify"
+  }
 }