fix: resolve Docker build failures and configuration issues

Add missing dependencies, fix Next.js config, update Docker Compose, and configure Tailwind CSS.

#VERCEL_SKIP

Co-authored-by: Anders Lehmann Pier <3219386+AndersPier@users.noreply.github.com>

next.config.mjs

@@ -1,8 +1,9 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   output: 'standalone',
+  // Remove the invalid outputFileTracingRoot option
   experimental: {
-    outputFileTracingRoot: undefined,
+    // Add any valid experimental options here if needed
   },
   // Optimize for Docker
   compress: true,