Nginx redirect only root domain but not subdomain to www
Currently I'm using setting below to redirect non-www domain to www domain and it's working fine:
server {
listen 80;
servername example.com;
return 301 http://www.example.com$requesturi;
}
server {
listen 80;
servername www.example.com;
location / {
proxypass http://www.example.com:8888;
proxyhttpversion 1.1;
proxysetheader Upgrade $httpupgrade;
proxysetheader Connection 'upgrade';
proxysetheader Host $host;
proxycachebypass $httpupgrade;
}
}
However, now I would like to allow wildcard subdomain but it seems like all the subdomains were being redirect to www.domain.com. So my question is how can I make it only redirect the root domain to www only and excluding all other subdomain? Thanks.