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-yang.js

@@ -0,0 +1,20 @@
+Prism.languages.yang = {
+	// https://tools.ietf.org/html/rfc6020#page-34
+	// http://www.yang-central.org/twiki/bin/view/Main/YangExamples
+	'comment': /\/\*[\s\S]*?\*\/|\/\/.*/,
+	'string': {
+		pattern: /"(?:[^\\"]|\\.)*"|'[^']*'/,
+		greedy: true
+	},
+	'keyword': {
+		pattern: /(^|[{};\r\n][ \t]*)[a-z_][\w.-]*/i,
+		lookbehind: true
+	},
+	'namespace': {
+		pattern: /(\s)[a-z_][\w.-]*(?=:)/i,
+		lookbehind: true
+	},
+	'boolean': /\b(?:false|true)\b/,
+	'operator': /\+/,
+	'punctuation': /[{};:]/
+};