Increase size limit of body in nginx.conf

This should hopefully fix the problem of image sending

proxy/nginx.conf

@@ -6,6 +6,7 @@ events {
 http {
     server {
         listen 80;
+        client_max_body_size 15M;
         location / {
             proxy_pass http://front:3000/;
             proxy_set_header Host $host;