Optimize CMS images during builds

package-lock.json

@@ -12,6 +12,7 @@
         "ajv-formats": "^3.0.1",
         "astro": "~7.2.0",
         "js-yaml": "4.3.2",
+        "sharp": "0.35.4",
         "wrangler": "^4.0.0"
       },
       "engines": {
@@ -4639,7 +4640,6 @@
       "integrity": "sha512-n++8XWcj+jCOr2IOl7h8LbKnGBDY4aPbmprMONBNFdn0ImXqpGVv5zliDs0V9HbmbCQLpbuo2ej9rAoOQTvMDA==",
       "dev": true,
       "license": "Apache-2.0",
-      "optional": true,
       "dependencies": {
         "@img/colour": "^1.1.0",
         "detect-libc": "^2.1.2",