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/assets/utils/proxy.js

@@ -0,0 +1,20 @@
+function getProxyCode(options, isSSR) {
+  const stringifiedFSPath = JSON.stringify(options.fsPath);
+  return `
+						new Proxy(${JSON.stringify(options)}, {
+						get(target, name, receiver) {
+							if (name === 'clone') {
+								return structuredClone(target);
+							}
+							if (name === 'fsPath') {
+								return ${stringifiedFSPath};
+							}
+							${!isSSR ? `if (target[name] !== undefined && globalThis.astroAsset) globalThis.astroAsset?.referencedImages.add(${stringifiedFSPath});` : ""}
+							return target[name];
+						}
+					})
+					`;
+}
+export {
+  getProxyCode
+};