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/env/runtime.d.ts

@@ -0,0 +1,9 @@
+import { AstroError } from '../core/errors/index.js';
+import type { ValidationResultInvalid } from './validators.js';
+export { getEnvFieldType, validateEnvVariable } from './validators.js';
+export type GetEnv = (key: string) => string | undefined;
+type OnSetGetEnv = () => void;
+export declare function setGetEnv(fn: GetEnv): void;
+export declare function setOnSetGetEnv(fn: OnSetGetEnv): void;
+export declare function getEnv(...args: Parameters<GetEnv>): string | undefined;
+export declare function createInvalidVariablesError(key: string, type: string, result: ValidationResultInvalid): AstroError;