Added missing Nginx template

templates/nginx.conf.j2

+# Based on https://wiki.jenkins.io/display/JENKINS/Jenkins+behind+an+NGinX+reverse+proxy
+upstream jenkins {
+  server 127.0.0.1:8080 fail_timeout=0;
+}
+
+server {
+  listen 80;
+  server_name {{ inventory_hostname }};
+  return 301 https://$host$request_uri;
+}
+
+server {
+  listen 443 ssl;
+  server_name {{ inventory_hostname }};
+
+  ssl_certificate /etc/letsencrypt/live/{{ inventory_hostname }}/fullchain.pem;
+  ssl_certificate_key /etc/letsencrypt/live/{{ inventory_hostname }}/privkey.pem;
+
+  location / {
+    proxy_set_header        Host $host:$server_port;
+    proxy_set_header        X-Real-IP $remote_addr;
+    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header        X-Forwarded-Proto $scheme;
+    proxy_redirect http:// https://;
+    proxy_pass              http://jenkins;
+	# Required for new HTTP-based CLI
+    proxy_http_version 1.1;
+	proxy_request_buffering off;
+    proxy_buffering off; # Required for HTTP-based CLI to work over SSL
+    # workaround for https://issues.jenkins-ci.org/browse/JENKINS-45651
+    add_header 'X-SSH-Endpoint' '{{ inventory_hostname }}:50022' always;
+  }
+}