aptly docker: change nginx log files to /var/aptly

The original log files of nginx are under '/var/log/nginx/'
which is not in local disk and it hard to collect these logs.
This commit changed these logs to the shared volume 'var/aptly'
of aptly docker.

Test Plan:
Pass: Create a new build environment and check with:
      $stx control enter --dockername repomgr
      $cat /var/aptly/nginx_error.log
      $cat /var/aptly/nginx_access.log
      exit from the repomgr:
      $cd ${STX_BUILD_HOME}
      $cat aptly/nginx_error.log
      $cat aptly/nginx_access.log
      nginx works and it logs into the above files

Story: 2008846
Task: 46647

Signed-off-by: Haiqing Bai <haiqing.bai@windriver.com>
Change-Id: Ibeeb7e1c2b98c3a5d8a78acd5bb269b45550589c

stx/dockerfiles/stx-aptly.Dockerfile

@@ -58,6 +58,7 @@ COPY stx/toCOPY/aptly/supervisord.aptly.conf /etc/supervisor/conf.d/aptly.conf
 COPY stx/toCOPY/aptly/nginx.conf.template /etc/nginx/nginx.conf.template
 COPY stx/toCOPY/aptly/supervisord.nginx.conf /etc/supervisor/conf.d/nginx.conf
 COPY stx/toCOPY/aptly/nginx.conf /etc/nginx/nginx.conf
+COPY stx/toCOPY/aptly/nginx.logrotate /etc/logrotate.d/nginx
 
 # Bind mount locations
 VOLUME [ "/var/aptly" ]

stx/toCOPY/aptly/nginx.conf

@@ -2,7 +2,7 @@
 user  nginx;
 worker_processes  auto;
 
-error_log  /var/log/nginx/error.log notice;
+error_log  /var/aptly/nginx_error.log notice;
 pid        /var/run/nginx.pid;
 
 
@@ -19,7 +19,7 @@ http {
                       '$status $body_bytes_sent "$http_referer" '
                       '"$http_user_agent" "$http_x_forwarded_for"';
 
-    access_log  /var/log/nginx/access.log  main;
+    access_log  /var/aptly/nginx_access.log  main;
 
     sendfile        on;
     #tcp_nopush     on;

stx/toCOPY/aptly/nginx.logrotate

@@ -0,0 +1,15 @@
+/var/aptly/nginx_*.log {
+        daily
+        missingok
+        rotate 52
+        compress
+        delaycompress
+        notifempty
+        create 640 nginx adm
+        sharedscripts
+        postrotate
+                if [ -f /var/run/nginx.pid ]; then
+                        kill -USR1 `cat /var/run/nginx.pid`
+                fi
+        endscript
+}