move default debian install to latest, add nginx.org install in stable

nginx/stable/Dockerfile

@@ -0,0 +1,22 @@
+FROM debian:jessie
+
+MAINTAINER Ric Lister <rlister@gmail.com>
+
+ADD http://nginx.org/keys/nginx_signing.key /tmp/
+
+RUN apt-key add /tmp/nginx_signing.key && \
+    rm -f /tmp/nginx_signing.key && \
+    (echo 'deb http://nginx.org/packages/debian/ jessie nginx' >> /etc/apt/sources.list) && \
+    apt-get update && \
+    DEBIAN_FRONTEND=noninteractive \
+    apt-get install -yq nginx && \
+    rm -rf /var/lib/apt/lists/* && \
+    echo "\ndaemon off;" >> /etc/nginx/nginx.conf
+
+VOLUME [ "/etc/nginx/sites-enabled", "/etc/nginx/certs", "/etc/nginx/conf.d", "/var/log/nginx", "/var/www/html" ]
+
+WORKDIR /etc/nginx
+
+EXPOSE 80 443
+
+CMD [ "nginx" ]