Adds CI, renames command to build

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Build
+
+on:
+  push:
+    branches: [ main ]
+    paths-ignore:
+      - '**/README.md'
+  pull_request:
+    branches: [ main ]
+    paths-ignore:
+      - '**/README.md'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run build

README.md

@@ -8,7 +8,7 @@ To generate the files as-is:
 
 ```
 $ npm install
-$ npm run gen
+$ npm run build
 ```
 
 To generate other atom themes, replace the `colors.less` with the corresponding theme's `color.less`.

package.json

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Packaging Atom's one-light theme for Jekyll usage",
   "scripts": {
-    "gen": "lessc syntax.less dist/syntax.css --clean-css"
+    "build": "lessc syntax.less dist/syntax.css --clean-css"
   },
   "repository": {
     "type": "git",