Configure nginx to emit logstash logs for access logs. Move all nginx config to a conf subdir. Rework nginx config to share common parts.

conf/server-base.conf

@@ -0,0 +1,24 @@
+client_max_body_size 8G;
+client_body_temp_path /mnt/logs/client_body 1 2;
+server_name _;
+
+keepalive_timeout 5;
+
+if ($args ~ "_escaped_fragment_") {
+    rewrite ^ /snapshot$uri;
+}
+
+location / {
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header Host $http_host;
+    proxy_redirect off;
+    proxy_buffering off;
+
+    proxy_request_buffering off;
+    proxy_set_header Transfer-Encoding $http_transfer_encoding;
+
+    proxy_pass   http://app_server;
+    proxy_read_timeout 2000;
+    proxy_temp_path /mnt/nginx/proxy_temp 1 2;
+}