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/zod-to-json-schema/dist/cjs/parsers/null.js

@@ -0,0 +1,14 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.parseNullDef = void 0;
+function parseNullDef(refs) {
+    return refs.target === "openApi3"
+        ? {
+            enum: ["null"],
+            nullable: true,
+        }
+        : {
+            type: "null",
+        };
+}
+exports.parseNullDef = parseNullDef;