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/shiki/dist/bundle-full.mjs

@@ -0,0 +1,27 @@
+import { createSingletonShorthands, guessEmbeddedLanguages, createBundledHighlighter } from '@shikijs/core';
+export * from '@shikijs/core';
+import { bundledLanguages } from './langs.mjs';
+export { bundledLanguagesAlias, bundledLanguagesBase, bundledLanguagesInfo } from './langs.mjs';
+import { bundledThemes } from './themes.mjs';
+export { bundledThemesInfo } from './themes.mjs';
+import { createOnigurumaEngine } from '@shikijs/engine-oniguruma';
+
+const createHighlighter = /* @__PURE__ */ createBundledHighlighter({
+  langs: bundledLanguages,
+  themes: bundledThemes,
+  engine: () => createOnigurumaEngine(import('shiki/wasm'))
+});
+const {
+  codeToHtml,
+  codeToHast,
+  codeToTokens,
+  codeToTokensBase,
+  codeToTokensWithThemes,
+  getSingletonHighlighter,
+  getLastGrammarState
+} = /* @__PURE__ */ createSingletonShorthands(
+  createHighlighter,
+  { guessEmbeddedLanguages }
+);
+
+export { bundledLanguages, bundledThemes, codeToHast, codeToHtml, codeToTokens, codeToTokensBase, codeToTokensWithThemes, createHighlighter, getLastGrammarState, getSingletonHighlighter };