How to redirect www to non www in openresty?

http { lua_shared_dict auto_ssl 1m; lua_shared_dict auto_ssl_settings 64k; resolver 8.8.8.8 ipv6=off; map $host $no_www_host { default $host; "~^www\.(.*)$" $1; } init_by_lua_block { auto_ssl = (require "resty.auto-ssl").new() auto_ssl:set("allow_domain", function(domain) return true end) auto_ssl:init() } init_worker_by_lua_block { auto_ssl:init_worker() } # SSL-enabled server server { listen 443 ssl; ssl_certificate_by_lua_block { auto_ssl:ssl_certificate() } ssl_certificate /etc/ssl/resty-auto-ssl-fallback.crt; ssl_certificate_key /etc/ssl/resty-auto-ssl-fallback.key; # Redirect www to non-www for HTTPS if ($host ~* ^www\.(.*)$) { return 301 https://$1$request_uri; } location / { include proxy_params; proxy_pass http://unix:/run/ecommerce_demo.sock; } } # HTTP to HTTPS redirection server { listen 80; location /.well-known/acme-challenge/ { content_by_lua_block { auto_ssl:challenge_server() } } location / { return 301 https://$no_www_host$request_uri; } } # Separate server block to handle www redirection for HTTP server { listen 80; server_name ~^www\.(.*)$; location / { return 301 http://$1$request_uri; } } # Auto SSL Hook Server server { listen 127.0.0.1:8999; client_body_buffer_size 128k; client_max_body_size 128k; location / { content_by_lua_block { auto_ssl:hook_server() } } } }