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/vite-plugin-astro-server/metadata.js

@@ -0,0 +1,36 @@
+import { viteID } from "../core/util.js";
+import { getAstroMetadata } from "../vite-plugin-astro/index.js";
+import { crawlGraph } from "./vite.js";
+async function getComponentMetadata(filePath, loader) {
+  const map = /* @__PURE__ */ new Map();
+  const rootID = viteID(filePath);
+  addMetadata(map, loader.getModuleInfo(rootID));
+  for await (const moduleNode of crawlGraph(loader, rootID, true)) {
+    const id = moduleNode.id;
+    if (id) {
+      addMetadata(map, loader.getModuleInfo(id));
+    }
+  }
+  return map;
+}
+function addMetadata(map, modInfo) {
+  if (modInfo) {
+    const astro = getAstroMetadata(modInfo);
+    if (astro) {
+      let metadata = {
+        containsHead: false,
+        propagation: "none"
+      };
+      if (astro.propagation) {
+        metadata.propagation = astro.propagation;
+      }
+      if (astro.containsHead) {
+        metadata.containsHead = astro.containsHead;
+      }
+      map.set(modInfo.id, metadata);
+    }
+  }
+}
+export {
+  getComponentMetadata
+};