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/@shikijs/engine-javascript/dist/index.d.mts

@@ -0,0 +1,5 @@
+export { J as JavaScriptRegexEngineOptions, a as JavaScriptRegexScannerOptions, b as JavaScriptScanner, c as createJavaScriptRegexEngine, d as defaultJavaScriptRegexConstructor } from './shared/engine-javascript.CDEDnU-m.mjs';
+export { createJavaScriptRawEngine } from './engine-raw.mjs';
+import '@shikijs/types';
+import 'oniguruma-to-es';
+import '@shikijs/vscode-textmate';