Complete Next.js migration with SSR and Docker deployment

- Migrate from vanilla JavaScript SPA to Next.js 16 with App Router
- Add server-side rendering for all pages (Home, Compare, Rankings)
- Create individual school pages with dynamic routing (/school/[urn])
- Implement Chart.js and Leaflet map integrations
- Add comprehensive SEO with sitemap, robots.txt, and JSON-LD
- Set up Docker multi-service architecture (PostgreSQL, FastAPI, Next.js)
- Update CI/CD pipeline to build both backend and frontend images
- Fix Dockerfile to include devDependencies for TypeScript compilation
- Add Jest testing configuration
- Implement performance optimizations (code splitting, caching)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

nextjs-app/components/Modal.module.css

@@ -0,0 +1,144 @@
+.overlay {
+  position: fixed;
+  inset: 0;
+  background: rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+  padding: 1rem;
+  animation: fadeIn 0.2s ease;
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
+}
+
+.modal {
+  background: white;
+  border-radius: 12px;
+  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
+  max-height: 90vh;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  animation: slideIn 0.3s ease;
+}
+
+@keyframes slideIn {
+  from {
+    transform: translateY(-20px);
+    opacity: 0;
+  }
+  to {
+    transform: translateY(0);
+    opacity: 1;
+  }
+}
+
+.modal.small {
+  width: 100%;
+  max-width: 400px;
+}
+
+.modal.medium {
+  width: 100%;
+  max-width: 600px;
+}
+
+.modal.large {
+  width: 100%;
+  max-width: 900px;
+}
+
+.header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 1.5rem;
+  border-bottom: 1px solid #e5e7eb;
+}
+
+.title {
+  margin: 0;
+  font-size: 1.25rem;
+  font-weight: 600;
+  color: #1f2937;
+}
+
+.closeButton {
+  padding: 0.5rem;
+  background: transparent;
+  border: none;
+  color: #6b7280;
+  cursor: pointer;
+  border-radius: 6px;
+  transition: all 0.2s ease;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.closeButton:hover {
+  background: #f3f4f6;
+  color: #1f2937;
+}
+
+.content {
+  padding: 1.5rem;
+  overflow-y: auto;
+  flex: 1;
+}
+
+/* Scrollbar styles */
+.content::-webkit-scrollbar {
+  width: 8px;
+}
+
+.content::-webkit-scrollbar-track {
+  background: #f3f4f6;
+}
+
+.content::-webkit-scrollbar-thumb {
+  background: #d1d5db;
+  border-radius: 4px;
+}
+
+.content::-webkit-scrollbar-thumb:hover {
+  background: #9ca3af;
+}
+
+@media (max-width: 640px) {
+  .overlay {
+    padding: 0;
+    align-items: flex-end;
+  }
+
+  .modal {
+    width: 100%;
+    max-width: 100%;
+    max-height: 95vh;
+    border-bottom-left-radius: 0;
+    border-bottom-right-radius: 0;
+    animation: slideUp 0.3s ease;
+  }
+
+  @keyframes slideUp {
+    from {
+      transform: translateY(100%);
+    }
+    to {
+      transform: translateY(0);
+    }
+  }
+
+  .header,
+  .content {
+    padding: 1rem;
+  }
+}