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/diff/libesm/patch/reverse.js

@@ -0,0 +1,23 @@
+export function reversePatch(structuredPatch) {
+    if (Array.isArray(structuredPatch)) {
+        // (See comment in unixToWin for why we need the pointless-looking anonymous function here)
+        return structuredPatch.map(patch => reversePatch(patch)).reverse();
+    }
+    return Object.assign(Object.assign({}, structuredPatch), { oldFileName: structuredPatch.newFileName, oldHeader: structuredPatch.newHeader, newFileName: structuredPatch.oldFileName, newHeader: structuredPatch.oldHeader, hunks: structuredPatch.hunks.map(hunk => {
+            return {
+                oldLines: hunk.newLines,
+                oldStart: hunk.newStart,
+                newLines: hunk.oldLines,
+                newStart: hunk.oldStart,
+                lines: hunk.lines.map(l => {
+                    if (l.startsWith('-')) {
+                        return `+${l.slice(1)}`;
+                    }
+                    if (l.startsWith('+')) {
+                        return `-${l.slice(1)}`;
+                    }
+                    return l;
+                })
+            };
+        }) });
+}