Reduce background model deployment overhead

Dockerfile

@@ -16,11 +16,14 @@ COPY . .
 # that directory in a BuildKit cache avoids downloading ~300 MB after every
 # source-only redeploy, while Vite still copies the assets into dist/imgly.
 RUN --mount=type=cache,id=plimi-imgly-assets,target=/app/public/imgly,sharing=locked \
-  pnpm build
+  pnpm build && mv /app/dist/imgly /app/imgly-dist
 
 FROM nginx:1.27-alpine AS runtime
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 COPY docker/40-generate-runtime-config.sh /docker-entrypoint.d/40-generate-runtime-config.sh
+# Keep the large, versioned model files in a stable layer. App-only changes can
+# then reuse this layer instead of exporting the full model bundle each time.
+COPY --from=build /app/imgly-dist /usr/share/nginx/html/imgly
 COPY --from=build /app/dist /usr/share/nginx/html
 RUN chmod +x /docker-entrypoint.d/40-generate-runtime-config.sh
 EXPOSE 80

package.json

@@ -10,7 +10,7 @@
     "predev": "node scripts/fetch-imgly-assets.mjs",
     "dev": "vite --host",
     "prebuild": "node scripts/fetch-imgly-assets.mjs",
-    "build": "tsc -b && vite build",
+    "build": "node scripts/build.mjs",
     "preview": "vite preview",
     "test": "vitest",
     "test:e2e": "playwright test",

scripts/build.mjs

@@ -0,0 +1,32 @@
+import { spawn } from "node:child_process";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+
+function run(script, args) {
+  const child = spawn(process.execPath, [path.join(root, script), ...args], {
+    cwd: root,
+    stdio: "inherit",
+  });
+
+  return new Promise((resolve, reject) => {
+    child.once("error", reject);
+    child.once("exit", (code, signal) => {
+      if (signal) {
+        reject(new Error(`${script} terminated by ${signal}`));
+        return;
+      }
+      resolve(code ?? 1);
+    });
+  });
+}
+
+const [typecheckStatus, viteStatus] = await Promise.all([
+  run("node_modules/typescript/bin/tsc", ["-b"]),
+  run("node_modules/vite/bin/vite.js", ["build"]),
+]);
+
+if (typecheckStatus !== 0 || viteStatus !== 0) {
+  process.exitCode = 1;
+}