Add missed nginx file

package/nginx/sharelatex.conf

@@ -0,0 +1,44 @@
+server {
+	listen         80;
+	server_name    _; # Catch all, see http://nginx.org/en/docs/http/server_names.html
+
+	set $static_path /var/www/sharelatex/web/public;
+
+	location / {
+		proxy_pass http://localhost:3000;
+		proxy_set_header Host $http_x_forwarded_host;
+		proxy_http_version 1.1;
+		proxy_set_header Upgrade $http_upgrade;
+		proxy_set_header Connection "upgrade";
+		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+		proxy_read_timeout 3m;
+		proxy_send_timeout 3m;
+	}
+	
+	location /socket.io {
+		proxy_pass http://localhost:3026;
+		proxy_set_header X-Forwarded-Proto $scheme;
+		proxy_set_header Host $http_x_forwarded_host;
+		proxy_http_version 1.1;
+		proxy_set_header Upgrade $http_upgrade;
+		proxy_set_header Connection "upgrade";
+		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+		proxy_read_timeout 3m;
+		proxy_send_timeout 3m;
+	}
+
+	location /stylesheets {
+		expires 1y;
+		root $static_path/;
+	}
+
+	location /minjs {
+		expires 1y;
+		root $static_path/;
+	}
+
+	location /img {
+		expires 1y;
+		root $static_path/;
+	}
+}