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/astro/dist/cli/infra/passthrough-text-styler.js

@@ -0,0 +1,23 @@
+class PassthroughTextStyler {
+  bgWhite(msg) {
+    return msg;
+  }
+  black(msg) {
+    return msg;
+  }
+  dim(msg) {
+    return msg;
+  }
+  green(msg) {
+    return msg;
+  }
+  bold(msg) {
+    return msg;
+  }
+  bgGreen(msg) {
+    return msg;
+  }
+}
+export {
+  PassthroughTextStyler
+};