add client_max_body_size

.docker/openresty/sites/app.conf.template

@@ -9,6 +9,8 @@ server {
     ssl_certificate     /certs/fullchain.pem;
     ssl_certificate_key /certs/private.key;
 
+    client_max_body_size 100M;
+
     location = /favicon.ico {
         log_not_found off;
         access_log off;