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.js

@@ -0,0 +1,32 @@
+import { AstroError, AstroErrorData } from "../core/errors/index.js";
+import { invalidVariablesToError } from "./errors.js";
+import { getEnvFieldType, validateEnvVariable } from "./validators.js";
+let _getEnv = (key) => process.env[key];
+function setGetEnv(fn) {
+  _getEnv = fn;
+  _onSetGetEnv();
+}
+let _onSetGetEnv = () => {
+};
+function setOnSetGetEnv(fn) {
+  _onSetGetEnv = fn;
+}
+function getEnv(...args) {
+  return _getEnv(...args);
+}
+function createInvalidVariablesError(key, type, result) {
+  return new AstroError({
+    ...AstroErrorData.EnvInvalidVariables,
+    message: AstroErrorData.EnvInvalidVariables.message(
+      invalidVariablesToError([{ key, type, errors: result.errors }])
+    )
+  });
+}
+export {
+  createInvalidVariablesError,
+  getEnv,
+  getEnvFieldType,
+  setGetEnv,
+  setOnSetGetEnv,
+  validateEnvVariable
+};