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-bnf.js

@@ -0,0 +1,21 @@
+Prism.languages.bnf = {
+	'string': {
+		pattern: /"[^\r\n"]*"|'[^\r\n']*'/
+	},
+	'definition': {
+		pattern: /<[^<>\r\n\t]+>(?=\s*::=)/,
+		alias: ['rule', 'keyword'],
+		inside: {
+			'punctuation': /^<|>$/
+		}
+	},
+	'rule': {
+		pattern: /<[^<>\r\n\t]+>/,
+		inside: {
+			'punctuation': /^<|>$/
+		}
+	},
+	'operator': /::=|[|()[\]{}*+?]|\.{3}/
+};
+
+Prism.languages.rbnf = Prism.languages.bnf;