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/oniguruma-parser/dist/bundle.js

@@ -0,0 +1,2 @@
+"use strict";export{generate}from"./generator/generate.js";export{toOnigurumaAst}from"./index.js";export{getOptionalOptimizations,optimize}from"./optimizer/optimize.js";export{parse}from"./parser/parse.js";export{traverse}from"./traverser/traverse.js";export{OnigUnicodePropertyMap}from"./unicode.js";
+//# sourceMappingURL=bundle.js.map