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/prismjs/components/prism-arff.js

@@ -0,0 +1,10 @@
+Prism.languages.arff = {
+	'comment': /%.*/,
+	'string': {
+		pattern: /(["'])(?:\\.|(?!\1)[^\\\r\n])*\1/,
+		greedy: true
+	},
+	'keyword': /@(?:attribute|data|end|relation)\b/i,
+	'number': /\b\d+(?:\.\d+)?\b/,
+	'punctuation': /[{},]/
+};