Fix typo in chown command in Dockerfile

Author: hiddehs

Dockerfile

@@ -36,7 +36,7 @@ COPY config/nginx.conf /etc/nginx/nginx.conf
 COPY config/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 
 # Make sure files/folders needed by the processes are accessable when they run under the nobody user
-RUN chown -R nobody.nobody /var/www/html /run /var/lib/nginx /var/log/nginx
+RUN chown -R nobody:nobody /var/www/html /run /var/lib/nginx /var/log/nginx
 
 # Switch to use a non-root user from here on
 USER nobody