webpack: Run with node --experimental-strip-types.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

tools/webpack

@@ -13,6 +13,13 @@ os.chdir(os.path.join(os.path.dirname(__file__), "../web"))
 
 from version import ZULIP_VERSION
 
+webpack_command = [
+    "node",
+    "--experimental-strip-types",
+    "--no-warnings=ExperimentalWarning",
+    "../node_modules/webpack-cli/bin/cli.js",
+]
+
 
 def build_for_prod_or_puppeteer(quiet: bool, config_name: str | None = None) -> NoReturn:
     """Builds for production, writing the output to disk"""
@@ -21,7 +28,8 @@ def build_for_prod_or_puppeteer(quiet: bool, config_name: str | None = None) ->
         if int(next(meminfo).split()[1]) < 3 * 1024 * 1024:
             os.environ["NODE_OPTIONS"] = "--max-old-space-size=1536"
     webpack_args = [
-        "../node_modules/.bin/webpack-cli",
+        *webpack_command,
+        "build",
         "--mode=production",
         f"--env=ZULIP_VERSION={ZULIP_VERSION}",
     ]
@@ -45,8 +53,9 @@ def build_for_dev_server(host: str, port: str, minify: bool, disable_host_check:
     # This is our most dynamic configuration, which we use for our
     # dev server.  The key piece here is that we identify changes to
     # files as devs make edits and serve new assets on the fly.
-    webpack_args = ["../node_modules/.bin/webpack-cli", "serve"]
-    webpack_args += [
+    webpack_args = [
+        *webpack_command,
+        "serve",
         # webpack-cli has a bug where it ignores --watch-poll with
         # multi-config, and we don't need the katex part anyway.
         "--config-name=frontend",