chore: add build script

build.js

@@ -0,0 +1,35 @@
+import { cpSync, copyFileSync, mkdirSync, readdirSync, rmSync } from 'node:fs'
+import { dirname, join, relative } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+const root = dirname(fileURLToPath(import.meta.url))
+const dist = join(root, 'dist')
+
+const rootFiles = ['index.html', 'game.html', 'style.css', 'serve.json']
+const jsDir = 'js'
+const imgFiles = ['sprite.svg']
+
+function listFiles(dir) {
+  return readdirSync(dir, { withFileTypes: true }).flatMap((entry) =>
+    entry.isDirectory() ? listFiles(join(dir, entry.name)) : [join(dir, entry.name)],
+  )
+}
+
+rmSync(dist, { recursive: true, force: true })
+mkdirSync(dist)
+
+for (const file of rootFiles) {
+  copyFileSync(join(root, file), join(dist, file))
+}
+
+cpSync(join(root, jsDir), join(dist, jsDir), { recursive: true })
+
+mkdirSync(join(dist, 'img'))
+for (const file of imgFiles) {
+  copyFileSync(join(root, 'img', file), join(dist, 'img', file))
+}
+
+console.log('Собрано в dist:')
+for (const file of listFiles(dist)) {
+  console.log('  ' + relative(dist, file))
+}