fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/astro/dist/assets/fonts/infra/fontace-font-file-reader.js

@@ -0,0 +1,25 @@
+import { readFileSync } from "node:fs";
+import { fontace } from "fontace";
+import { AstroError, AstroErrorData } from "../../../core/errors/index.js";
+class FontaceFontFileReader {
+  extract({ family, url }) {
+    try {
+      const data = fontace(readFileSync(url));
+      return {
+        weight: data.weight,
+        style: data.style
+      };
+    } catch (cause) {
+      throw new AstroError(
+        {
+          ...AstroErrorData.CannotDetermineWeightAndStyleFromFontFile,
+          message: AstroErrorData.CannotDetermineWeightAndStyleFromFontFile.message(family, url)
+        },
+        { cause }
+      );
+    }
+  }
+}
+export {
+  FontaceFontFileReader
+};