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/cli/preview/index.js

@@ -0,0 +1,34 @@
+import colors from "piccolore";
+import { printHelp } from "../../core/messages.js";
+import previewServer from "../../core/preview/index.js";
+import { flagsToAstroInlineConfig } from "../flags.js";
+async function preview({ flags }) {
+  if (flags?.help || flags?.h) {
+    printHelp({
+      commandName: "astro preview",
+      usage: "[...flags]",
+      tables: {
+        Flags: [
+          ["--port", `Specify which port to run on. Defaults to 4321.`],
+          ["--host", `Listen on all addresses, including LAN and public addresses.`],
+          ["--host <custom-address>", `Expose on a network IP address at <custom-address>`],
+          ["--open", "Automatically open the app in the browser on server start"],
+          [
+            "--allowed-hosts",
+            "Specify a comma-separated list of allowed hosts or allow any hostname."
+          ],
+          ["--help (-h)", "See all available flags."]
+        ]
+      },
+      description: `Starts a local server to serve your static dist/ directory. Check ${colors.cyan(
+        "https://docs.astro.build/en/reference/cli-reference/#astro-preview"
+      )} for more information.`
+    });
+    return;
+  }
+  const inlineConfig = flagsToAstroInlineConfig(flags);
+  return await previewServer(inlineConfig);
+}
+export {
+  preview
+};