diff --git a/README.md b/README.md
index 10bc665..4fc3aa1 100644
--- a/README.md
+++ b/README.md
@@ -1226,6 +1226,7 @@ The number of days before rotated files are deleted.
 Custom configurations files (ending with .conf suffix) can be added in some directory inside the container :
   - /http-confs : http context
   - /server-confs : server context
+  - /pre-server-confs : before server context (add map or upstream config)
 
 You just need to use a volume like this :
 ```shell
diff --git a/confs/site/server.conf b/confs/site/server.conf
index 2a23a4f..ef90871 100644
--- a/confs/site/server.conf
+++ b/confs/site/server.conf
@@ -1,3 +1,5 @@
+%PRE_SERVER_CONF%
+
 server {
 	%FASTCGI_PATH%
 	%SERVER_CONF%
diff --git a/entrypoint/site-config.sh b/entrypoint/site-config.sh
index 03d0324..1df2fd8 100644
--- a/entrypoint/site-config.sh
+++ b/entrypoint/site-config.sh
@@ -47,8 +47,10 @@ cp /opt/confs/site/* "$NGINX_PREFIX"
 replace_in_file "${NGINX_PREFIX}server.conf" "%MAIN_LUA%" "include ${NGINX_PREFIX}main-lua.conf;"
 if [ "$MULTISITE" = "yes" ] ; then
 	replace_in_file "${NGINX_PREFIX}server.conf" "%SERVER_CONF%" "include /server-confs/*.conf;\ninclude /server-confs/${1}/*.conf;"
+	replace_in_file "${NGINX_PREFIX}server.conf" "%PRE_SERVER_CONF%" "include /pre-server-confs/*.conf;\ninclude /pre-server-confs/${1}/*.conf;"
 else
 	replace_in_file "${NGINX_PREFIX}server.conf" "%SERVER_CONF%" "include /server-confs/*.conf;"
+	replace_in_file "${NGINX_PREFIX}server.conf" "%PRE_SERVER_CONF%" "include /pre-server-confs/*.conf;\ninclude /pre-server-confs/${1}/*.conf;"
 fi
 
 # max body size