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/@shikijs/langs/dist/jinja-html.mjs

@@ -0,0 +1,8 @@
+import html from './html.mjs'
+
+const lang = Object.freeze(JSON.parse("{\"displayName\":\"jinja-html\",\"firstLineMatch\":\"^\\\\{% extends [\\\"'][^\\\"']+[\\\"'] %}\",\"foldingStartMarker\":\"(<(?i:(head|table|tr|div|style|script|ul|ol|form|dl))\\\\b.*?>|\\\\{%\\\\s*(block|filter|for|if|macro|raw))\",\"foldingStopMarker\":\"(</(?i:(head|table|tr|div|style|script|ul|ol|form|dl))\\\\b.*?>|\\\\{%\\\\s*(end(?:block|filter|for|if|macro|raw))\\\\s*%})\",\"name\":\"jinja-html\",\"patterns\":[{\"include\":\"source.jinja\"},{\"include\":\"text.html.basic\"}],\"scopeName\":\"text.html.jinja\",\"embeddedLangs\":[\"html\"]}"))
+
+export default [
+...html,
+lang
+]