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/fonts/infra/minifiable-css-renderer.d.ts

@@ -0,0 +1,15 @@
+import type { CssRenderer } from '../definitions.js';
+import type { CssProperties } from '../types.js';
+export declare function renderFontFace(properties: CssProperties, minify: boolean): string;
+export declare function renderCssVariable(key: string, values: Array<string>, minify: boolean): string;
+export declare function withFamily(family: string, properties: CssProperties): CssProperties;
+/** If the value contains spaces (which would be incorrectly interpreted), we wrap it in quotes. */
+export declare function handleValueWithSpaces(value: string): string;
+export declare class MinifiableCssRenderer implements CssRenderer {
+    #private;
+    constructor({ minify }: {
+        minify: boolean;
+    });
+    generateFontFace(family: string, properties: CssProperties): string;
+    generateCssVariable(key: string, values: Array<string>): string;
+}