Add "CI" commad, becuase apparently that needs to be set now?

package.json

@@ -14,7 +14,8 @@
     "serve:css": "postcss src/css/styles.css --base src --dir _site/assets -w",
     "serve:eleventy": "eleventy --serve --incremental",
     "test": "echo \"Error: no test specified\" && exit 1",
-    "post": "./node_modules/.bin/blog-post"
+    "post": "./node_modules/.bin/blog-post",
+    "ci": "npm run build"
   },
   "author": "",
   "license": "ISC",