diff --git a/Dockerfile b/Dockerfile
index 0d1ac6c..5bcac21 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,10 +22,7 @@ FROM nginx:stable-alpine AS runner
 # Copy build output
 COPY --from=builder /app/build /usr/share/nginx/html
 
-# Optionnel : config nginx simple (si tu veux un fallback pour SPA)
-# Crée un fichier nginx.conf local et COPY-le ici si tu veux une config spécifique.
-# Exemple basique pour SPA (fallback to index.html)
-# COPY nginx-spa.conf /etc/nginx/conf.d/nginx-spa.conf
+COPY nginx-spa.conf /etc/nginx/conf.d/nginx-spa.conf
 
 # Expose port 80 (Caddy fera reverse proxy)
 EXPOSE 80
diff --git a/nginx-spa.conf b/nginx-spa.conf
new file mode 100644
index 0000000..811ca97
--- /dev/null
+++ b/nginx-spa.conf
@@ -0,0 +1,22 @@
+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Proxy API to backend container
+    location /api/ {
+        proxy_pass http://poster-picker-backend-1:5000/api/;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # SPA fallback
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}