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-json.js

@@ -0,0 +1,27 @@
+// https://www.json.org/json-en.html
+Prism.languages.json = {
+	'property': {
+		pattern: /(^|[^\\])"(?:\\.|[^\\"\r\n])*"(?=\s*:)/,
+		lookbehind: true,
+		greedy: true
+	},
+	'string': {
+		pattern: /(^|[^\\])"(?:\\.|[^\\"\r\n])*"(?!\s*:)/,
+		lookbehind: true,
+		greedy: true
+	},
+	'comment': {
+		pattern: /\/\/.*|\/\*[\s\S]*?(?:\*\/|$)/,
+		greedy: true
+	},
+	'number': /-?\b\d+(?:\.\d+)?(?:e[+-]?\d+)?\b/i,
+	'punctuation': /[{}[\],]/,
+	'operator': /:/,
+	'boolean': /\b(?:false|true)\b/,
+	'null': {
+		pattern: /\bnull\b/,
+		alias: 'keyword'
+	}
+};
+
+Prism.languages.webmanifest = Prism.languages.json;