Update to nginx:mainline-alpine

Update to nginx:mainline-alpine to resolve CVE-2021-36159 present in earlier versions of alpine

Author: ebuttonsdude

DockerfileLight

@@ -1,3 +1,3 @@
-FROM nginx:stable-alpine
+FROM nginx:mainline-alpine
 COPY ./dist /usr/share/nginx/html
 COPY default.conf /etc/nginx/conf.d/default.conf