Updated mainline nginx to 1.15.7 and njs to 0.2.6.

mainline/alpine-perl/Dockerfile

@@ -2,7 +2,7 @@ FROM alpine:3.8
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
-ENV NGINX_VERSION 1.15.6
+ENV NGINX_VERSION 1.15.7
 
 RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
 	&& CONFIG="\

mainline/alpine/Dockerfile

@@ -2,7 +2,7 @@ FROM alpine:3.8
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
-ENV NGINX_VERSION 1.15.6
+ENV NGINX_VERSION 1.15.7
 
 RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
 	&& CONFIG="\

mainline/stretch-perl/Dockerfile

@@ -2,8 +2,8 @@ FROM debian:stretch-slim
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
-ENV NGINX_VERSION 1.15.6-1~stretch
-ENV NJS_VERSION   1.15.6.0.2.5-1~stretch
+ENV NGINX_VERSION 1.15.7-1~stretch
+ENV NJS_VERSION   1.15.7.0.2.6-1~stretch
 
 RUN set -x \
 	&& apt-get update \

mainline/stretch/Dockerfile

@@ -2,8 +2,8 @@ FROM debian:stretch-slim
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
-ENV NGINX_VERSION 1.15.6-1~stretch
-ENV NJS_VERSION   1.15.6.0.2.5-1~stretch
+ENV NGINX_VERSION 1.15.7-1~stretch
+ENV NJS_VERSION   1.15.7.0.2.6-1~stretch
 
 RUN set -x \
 	&& apt-get update \