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/build-font-file-id-generator.js

@@ -0,0 +1,17 @@
+class BuildFontFileIdGenerator {
+  #hasher;
+  #contentResolver;
+  constructor({
+    hasher,
+    contentResolver
+  }) {
+    this.#hasher = hasher;
+    this.#contentResolver = contentResolver;
+  }
+  generate({ originalUrl, type }) {
+    return `${this.#hasher.hashString(this.#contentResolver.resolve(originalUrl))}.${type}`;
+  }
+}
+export {
+  BuildFontFileIdGenerator
+};