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/mdast-util-to-markdown/lib/configure.d.ts

@@ -0,0 +1,9 @@
+/**
+ * @param {State} base
+ * @param {Options} extension
+ * @returns {State}
+ */
+export function configure(base: State, extension: Options): State;
+import type { State } from './types.js';
+import type { Options } from './types.js';
+//# sourceMappingURL=configure.d.ts.map