fix deploy issues

- make supervisorctl happy
 - fix avatar path
 - refine logging config
 - add nginx buffer path

deploy/nginx/common.conf

@@ -1,5 +1,5 @@
 location /public {
-    root /app/data;
+    root /data;
 }
 
 location /api {

deploy/nginx/nginx.conf

@@ -20,6 +20,7 @@ http {
 	gzip on;
 	gzip_vary on;
 	gzip_types application/javascript text/css;
+	client_body_temp_path /tmp 1 2;
 
 	log_format main '$remote_addr - $remote_user [$time_local] "$request" '
 			'$status $body_bytes_sent "$http_referer" '