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/css-tree/cjs/syntax/atrule/starting-style.cjs

@@ -0,0 +1,12 @@
+'use strict';
+
+const startingStyle = {
+    parse: {
+        prelude: null,
+        block(nested = false) {
+            return this.Block(nested);
+        }
+    }
+};
+
+module.exports = startingStyle;