Add trailing slash in path in nginx.conf

frontend/nginx/nginx.conf

@@ -1,7 +1,7 @@
 server {
     listen 80;
 
-    location /api {
+    location /api/ {
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header Host $http_host;