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/info/infra/yarn-package-manager.js

@@ -0,0 +1,34 @@
+function getYarnOutputDepVersion(dependency, outputLine) {
+  const parsed = JSON.parse(outputLine);
+  for (const [key, value] of Object.entries(parsed.children)) {
+    if (key.startsWith(`${dependency}@`)) {
+      return `v${value.locator.split(":").pop()}`;
+    }
+  }
+}
+class YarnPackageManager {
+  name = "yarn";
+  #commandExecutor;
+  constructor({ commandExecutor }) {
+    this.#commandExecutor = commandExecutor;
+  }
+  async getPackageVersion(name) {
+    try {
+      const { stdout } = await this.#commandExecutor.execute("yarn", ["why", name, "--json"], {
+        shell: true
+      });
+      const hasUserDefinition = stdout.includes("workspace:.");
+      for (const line of stdout.split("\n")) {
+        if (hasUserDefinition && line.includes("workspace:."))
+          return getYarnOutputDepVersion(name, line);
+        if (!hasUserDefinition && line.includes("astro@"))
+          return getYarnOutputDepVersion(name, line);
+      }
+    } catch {
+      return void 0;
+    }
+  }
+}
+export {
+  YarnPackageManager
+};