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/astro/dist/runtime/compiler/index.d.ts

@@ -0,0 +1 @@
+export { addAttribute, createAstro, createComponent, createTransitionScope, defineScriptVars, defineStyleVars, Fragment, maybeRenderHead, mergeSlots, render, renderComponent, renderHead, renderScript, renderSlot, renderTransition, spreadAttributes, unescapeHTML, } from '../server/index.js';

node_modules/astro/dist/runtime/compiler/index.js

@@ -0,0 +1,38 @@
+import {
+  addAttribute,
+  createAstro,
+  createComponent,
+  createTransitionScope,
+  defineScriptVars,
+  defineStyleVars,
+  Fragment,
+  maybeRenderHead,
+  mergeSlots,
+  render,
+  renderComponent,
+  renderHead,
+  renderScript,
+  renderSlot,
+  renderTransition,
+  spreadAttributes,
+  unescapeHTML
+} from "../server/index.js";
+export {
+  Fragment,
+  addAttribute,
+  createAstro,
+  createComponent,
+  createTransitionScope,
+  defineScriptVars,
+  defineStyleVars,
+  maybeRenderHead,
+  mergeSlots,
+  render,
+  renderComponent,
+  renderHead,
+  renderScript,
+  renderSlot,
+  renderTransition,
+  spreadAttributes,
+  unescapeHTML
+};