feat: initial version

builder/images.js

@@ -0,0 +1,18 @@
+import sharp from 'sharp';
+import crypto from 'node:crypto';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+export async function hashFile(p) {
+  const buf = await fs.readFile(p);
+  return crypto.createHash('sha256').update(buf).digest('hex').slice(0, 8);
+}
+
+export async function optimizeImage(src, dest, { width = 640, height = null } = {}) {
+  await fs.mkdir(path.dirname(dest), { recursive: true });
+  let img = sharp(src);
+  img = height
+    ? img.resize(width, height, { fit: 'cover' })
+    : img.resize({ width, withoutEnlargement: true });
+  await img.webp({ quality: 80 }).toFile(dest);
+}