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/micromark-extension-gfm-table/dev/lib/syntax.d.ts

@@ -0,0 +1,18 @@
+/**
+ * Create an HTML extension for `micromark` to support GitHub tables syntax.
+ *
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions` to enable GFM
+ *   table syntax.
+ */
+export function gfmTable(): Extension;
+/**
+ * Cell info.
+ */
+export type Range = [number, number, number, number];
+/**
+ * Where we are: `1` for head row, `2` for delimiter row, `3` for body row.
+ */
+export type RowKind = 0 | 1 | 2 | 3;
+import type { Extension } from 'micromark-util-types';
+//# sourceMappingURL=syntax.d.ts.map