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/lib/syntax/node/Value.js

@@ -0,0 +1,19 @@
+export const name = 'Value';
+export const structure = {
+    children: [[]]
+};
+
+export function parse() {
+    const start = this.tokenStart;
+    const children = this.readSequence(this.scope.Value);
+
+    return {
+        type: 'Value',
+        loc: this.getLocation(start, this.tokenStart),
+        children
+    };
+}
+
+export function generate(node) {
+    this.children(node);
+}