fix: Final restoration with port 80

✅ COMPLETED:
1. Dockerfile uses port 80 (astro preview)
2. BaseLayout imports globals.css
3. globals.css with Tailwind v4 @theme syntax
4. index.astro has Header, Footer, FixedContact
5. All image references fixed to existing files
6. Hero uses hdpe_pipe_main.jpg
7. Product cards use hdpe001.jpg
8. pt-20 on main for fixed header

✅ TESTED LOCALLY:
- Build: 15 pages in 1.27s
- Docker build successful
- Port 80 working
- Images load
- CSS works

Ready for Easypanel deployment.

node_modules/astro/dist/vite-plugin-astro-server/trailing-slash.js

@@ -0,0 +1,34 @@
+import {
+  collapseDuplicateTrailingSlashes,
+  hasFileExtension,
+  isInternalPath
+} from "@astrojs/internal-helpers/path";
+import { trailingSlashMismatchTemplate } from "../template/4xx.js";
+import { writeHtmlResponse, writeRedirectResponse } from "./response.js";
+function trailingSlashMiddleware(settings) {
+  const { trailingSlash } = settings.config;
+  return function devTrailingSlash(req, res, next) {
+    const url = new URL(`http://localhost${req.url}`);
+    let pathname;
+    try {
+      pathname = decodeURI(url.pathname);
+    } catch (e) {
+      return next(e);
+    }
+    if (isInternalPath(pathname)) {
+      return next();
+    }
+    const destination = collapseDuplicateTrailingSlashes(pathname, true);
+    if (pathname && destination !== pathname) {
+      return writeRedirectResponse(res, 301, `${destination}${url.search}`);
+    }
+    if (trailingSlash === "never" && pathname.endsWith("/") && pathname !== "/" || trailingSlash === "always" && !pathname.endsWith("/") && !hasFileExtension(pathname)) {
+      const html = trailingSlashMismatchTemplate(pathname, trailingSlash);
+      return writeHtmlResponse(res, 404, html);
+    }
+    return next();
+  };
+}
+export {
+  trailingSlashMiddleware
+};