From Heroku Staging

config/nginx.conf.erb

@@ -0,0 +1,57 @@
+daemon off;
+#Heroku dynos have at least 4 cores.
+worker_processes <%= ENV['NGINX_WORKERS'] || 4 %>;
+
+events {
+	use epoll;
+	accept_mutex on;
+	worker_connections <%= ENV['NGINX_WORKER_CONNECTIONS'] || 1024 %>;
+}
+
+http {
+	gzip on;
+	gzip_comp_level 2;
+	gzip_min_length 512;
+
+	server_tokens off;
+
+	log_format l2met 'measure#nginx.service=$request_time request_id=$http_x_request_id';
+	access_log <%= ENV['NGINX_ACCESS_LOG_PATH'] || 'logs/nginx/access.log' %> l2met;
+	error_log <%= ENV['NGINX_ERROR_LOG_PATH'] || 'logs/nginx/error.log' %>;
+
+	include mime.types;
+	default_type application/octet-stream;
+	sendfile on;
+
+	#Must read the body in 5 seconds.
+	client_body_timeout 5;
+
+	upstream app_server {
+		server unix:/tmp/nginx.socket fail_timeout=0;
+ 	}
+
+	server {
+		listen <%= ENV['PORT'] %>;
+		server_name _;
+		keepalive_timeout 5;
+
+		add_header Strict-Transport-Security "max-age=31536000";
+		add_header Referrer-Policy "no-referrer, same-origin";
+
+		location / {
+			proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+			proxy_set_header Host $http_host;
+			proxy_redirect off;
+			proxy_pass http://app_server;
+		}
+
+		<% if ENV['STATIC_PROXY'] %>
+			location /interactives/2019annualreport/static/ {
+				proxy_pass http://<%= ENV['STATIC_PROXY'] %>/interactives/2019annualreport/static/;
+				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;
+			}
+		<% end %>
+	}
+}

package.json

@@ -72,9 +72,10 @@
     "sass": "1.22.12",
     "sass-lint": "1.13.1",
     "sharp": "0.23.2",
-    "winston": "^3.2.1"
+    "winston": "3.2.1"
   },
   "engines": {
-    "node": "8.* || >= 10.*"
+    "node": "12.17.0",
+    "npm": "6.14.4"
   }
 }

static.json

@@ -0,0 +1,7 @@
+{
+  "proxies": {
+    "/interactives/2019annualreport/static/": {
+      "origin": "https://${STATIC_PROXY}/"
+    }
+  }
+}