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/utils/index.d.ts

@@ -0,0 +1,17 @@
+/**
+ * NOTE: this is a public module exposed to the user, so all functions exposed
+ * here must be documented via JsDoc and in the docs website.
+ *
+ * If some functions don't need to be exposed, just import the file that contains the functions.
+ */
+export { isRemoteAllowed, matchHostname, matchPathname, matchPattern, matchPort, matchProtocol, type RemotePattern, } from '@astrojs/internal-helpers/remote';
+export { isESMImportedImage, isRemoteImage, resolveSrc } from './imageKind.js';
+export { imageMetadata } from './metadata.js';
+export { 
+/**
+ * @deprecated
+ */
+emitESMImage, emitImageMetadata, } from './node/emitAsset.js';
+export { getOrigQueryParams } from './queryParams.js';
+export { inferRemoteSize } from './remoteProbe.js';
+export { hashTransform, propsToFilename } from './transformToPath.js';