Patch nginx.tmpl from jwilder/nginx-proxy and JrCs/docker-letsencrypt-nginx-proxy-companion to allow expired certificates to renew

nginx.tmpl.patch

--- nginx.tmpl	2017-12-29 08:56:32.000000000 -0700
+++ nginx.tmpl	2017-12-29 08:56:32.000000000 -0700
@@ -193,7 +193,18 @@
 	listen [::]:80 {{ $default_server }};
 	{{ end }}
 	access_log /var/log/nginx/access.log vhost;
-	return 301 https://$host$request_uri;
+
+	location /.well-known/acme-challenge/ {
+	    auth_basic off;
+	    allow all;
+	    root /usr/share/nginx/html;
+	    try_files $uri =404;
+	    break;
+	}
+
+	location / {
+		return 301 https://$host$request_uri;
+	}
 }
 {{ end }}