Use lowercase

compose.yml

@@ -7,7 +7,7 @@ services:
     environment:
       - DOMAIN=${DOMAIN}
     configs:
-      - source: nginx-conf
+      - source: nginx_conf
         target: /etc/nginx/nginx.conf
     volumes:
       - "public:/var/www/app/public"
@@ -99,7 +99,7 @@ secrets:
     external: true
 
 configs:
-  nginx-conf:
-    name: ${STACK_NAME}-nginx-conf-${NGINX_CONF_VERSION}
+  nginx_conf:
+    name: ${STACK_NAME}_nginx_conf_${NGINX_CONF_VERSION}
     file: nginx.conf.tmpl
     template_driver: golang