Prevent nginx from caching request body for salt-api

PROD-34798

Change-Id: Ica338b4aadaff610a8cc7768a5c0f895048da9ab
diff --git a/nginx/server/proxy/salt_api.yml b/nginx/server/proxy/salt_api.yml
index f559ef4..bb8d7c7 100644
--- a/nginx/server/proxy/salt_api.yml
+++ b/nginx/server/proxy/salt_api.yml
@@ -21,6 +21,8 @@
             host: ${_param:infra_config_hostname}.${_param:cluster_domain}
             port: ${_param:nginx_proxy_salt_api_proxy_port}
             protocol: ${_param:nginx_proxy_salt_api_proxy_protocol}
+            # Prevent nginx from caching request body
+            request_buffer: false
           host:
             name: ${_param:infra_config_hostname}.${_param:cluster_domain}
             port: ${_param:nginx_proxy_salt_api_site_port}