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/oniguruma-to-es/dist/cjs/unicode.d.ts

@@ -0,0 +1,6 @@
+export const asciiSpaceChar: "[\t-\r ]";
+export const defaultWordChar: string;
+export function getIgnoreCaseMatchChars(char: any): any[];
+export const JsUnicodePropertyMap: Map<any, string>;
+export const PosixClassMap: Map<string, string>;
+export const UnicodePropertiesWithSpecificCase: Set<string>;