Update Docker images

roles/matrix-server/defaults/main.yml

@@ -38,9 +38,9 @@ matrix_nginx_proxy_confd_path: "{{ matrix_nginx_proxy_data_path }}/conf.d"
 matrix_nginx_riot_web_data_path: "{{ matrix_base_data_path }}/riot-web"
 matrix_scratchpad_dir: "{{ matrix_base_data_path }}/scratchpad"
 
-docker_postgres_image: "postgres:9.6.7-alpine"
-docker_matrix_image: "avhost/docker-matrix:v0.26.0"
-docker_nginx_image: "nginx:1.13.8-alpine"
+docker_postgres_image: "postgres:9.6.8-alpine"
+docker_matrix_image: "avhost/docker-matrix:v0.26.1"
+docker_nginx_image: "nginx:1.13.9-alpine"
 docker_riot_image: "avhost/docker-matrix-riot:latest"
 docker_s3fs_image: "xueshanf/s3fs:latest"
 docker_goofys_image: "cloudproto/goofys:latest"