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/@tailwindcss/postcss/dist/index.d.mts

@@ -0,0 +1,25 @@
+import { PluginCreator } from 'postcss';
+
+type PluginOptions = {
+    /**
+     * The base directory to scan for class candidates.
+     *
+     * Defaults to the current working directory.
+     */
+    base?: string;
+    /**
+     * Optimize and minify the output CSS.
+     */
+    optimize?: boolean | {
+        minify?: boolean;
+    };
+    /**
+     * Enable or disable asset URL rewriting.
+     *
+     * Defaults to `true`.
+     */
+    transformAssetUrls?: boolean;
+};
+declare const _default: PluginCreator<PluginOptions>;
+
+export { type PluginOptions, _default as default };

node_modules/@tailwindcss/postcss/dist/index.d.ts

@@ -0,0 +1,25 @@
+import { PluginCreator } from 'postcss';
+
+type PluginOptions = {
+    /**
+     * The base directory to scan for class candidates.
+     *
+     * Defaults to the current working directory.
+     */
+    base?: string;
+    /**
+     * Optimize and minify the output CSS.
+     */
+    optimize?: boolean | {
+        minify?: boolean;
+    };
+    /**
+     * Enable or disable asset URL rewriting.
+     *
+     * Defaults to `true`.
+     */
+    transformAssetUrls?: boolean;
+};
+declare const _default: PluginCreator<PluginOptions>;
+
+export = _default;