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/path-is-inside/lib/path-is-inside.js

@@ -0,0 +1,28 @@
+"use strict";
+
+var path = require("path");
+
+module.exports = function (thePath, potentialParent) {
+    // For inside-directory checking, we want to allow trailing slashes, so normalize.
+    thePath = stripTrailingSep(thePath);
+    potentialParent = stripTrailingSep(potentialParent);
+
+    // Node treats only Windows as case-insensitive in its path module; we follow those conventions.
+    if (process.platform === "win32") {
+        thePath = thePath.toLowerCase();
+        potentialParent = potentialParent.toLowerCase();
+    }
+
+    return thePath.lastIndexOf(potentialParent, 0) === 0 &&
+		(
+			thePath[potentialParent.length] === path.sep ||
+			thePath[potentialParent.length] === undefined
+		);
+};
+
+function stripTrailingSep(thePath) {
+    if (thePath[thePath.length - 1] === path.sep) {
+        return thePath.slice(0, -1);
+    }
+    return thePath;
+}