perf: precompress HiCAD frontend assets

deploy/nginx-hicad-zoo-ws.conf.template

@@ -4,6 +4,7 @@
 location ^~ /vendor/zoo-modeling-app/assets/ {
     root /var/www/ai-chatbot/public;
     try_files $uri =404;
+    gzip_static on;
     add_header Cache-Control "public, max-age=31536000, immutable" always;
 }
 

scripts/vendor-zoo-modeling-app.mjs

@@ -5,12 +5,14 @@ import {
   copyFileSync,
   existsSync,
   mkdirSync,
+  readdirSync,
   readFileSync,
   rmSync,
   writeFileSync,
 } from "node:fs";
 import { cp } from "node:fs/promises";
 import path from "node:path";
+import { gzipSync } from "node:zlib";
 
 const repoUrl = "https://github.com/KittyCAD/modeling-app.git";
 const repoRef =
@@ -298,6 +300,17 @@ function ensureWasm() {
   copyFileSync(wasmBinary, path.join(sourceDir, "public/kcl_wasm_lib_bg.wasm"));
 }
 
+function precompressVersionedAssets() {
+  const assetsDir = path.join(outputDir, "assets");
+  for (const entry of readdirSync(assetsDir, { withFileTypes: true })) {
+    if (!entry.isFile() || !/\.(?:css|js)$/.test(entry.name)) {
+      continue;
+    }
+    const assetPath = path.join(assetsDir, entry.name);
+    writeFileSync(`${assetPath}.gz`, gzipSync(readFileSync(assetPath), { level: 9 }));
+  }
+}
+
 async function main() {
   ensureOfficialSource();
   ensureDependencies();
@@ -329,6 +342,7 @@ async function main() {
   rmSync(outputDir, { force: true, recursive: true });
   mkdirSync(path.dirname(outputDir), { recursive: true });
   await cp(buildDir, outputDir, { recursive: true });
+  precompressVersionedAssets();
 
   const license = path.join(sourceDir, "LICENSE");
   if (existsSync(license)) {