Issue LIF-Initiative#880: Add SPA fallback nginx config to Advisor frontend

Add nginx.conf with try_files fallback to index.html, matching the
MDR frontend pattern. Without this, client-side routes like /login
return a 404 from nginx, leaving users on a blank error page after
a failed login attempt.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bjagg

frontends/lif_advisor_app/Dockerfile

@@ -25,8 +25,8 @@ FROM nginx:1.26-alpine AS serve
 # Copy built files from the previous stage
 COPY --from=build /app/dist /usr/share/nginx/html/
 
-# Optionally: copy custom nginx config - for SPA, you'll need this, similar to mdr-frontend
-# COPY ./docker/nginx.conf /etc/nginx/conf.d/default.conf
+# Copy custom nginx config for SPA fallback routing
+COPY nginx.conf /etc/nginx/conf.d/default.conf
 
 # Expose default Nginx port
 EXPOSE 80

frontends/lif_advisor_app/nginx.conf

@@ -0,0 +1,10 @@
+server {
+    listen 80;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri /index.html;
+    }
+}