Update Nginx installation from latest official image

as now Python 3.5 is also based on Debian Stretch

python3.5/Dockerfile

@@ -5,22 +5,100 @@ LABEL maintainer="Sebastian Ramirez <tiangolo@gmail.com>"
 # Install uWSGI
 RUN pip install uwsgi
 
-# There is no longer an official Nginx Docker image for Debian Jessie, only for Debian Stretch,
-# but the official Python 3.5 image is only available in Debian Jessie,
-# so, here's an updated custom Nginx installation, based on the last official Jessie Nginx image
-# Installation reference: https://www.nginx.com/resources/wiki/start/topics/tutorials/install/
-# Packages repo: http://nginx.org/packages/debian/dists/jessie/
-ENV NGINX_VERSION 1.15.0-1~jessie
-RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ABF5BD827BD9BF62 \
-	&& echo "deb http://nginx.org/packages/mainline/debian/ jessie nginx" >> /etc/apt/sources.list \
+# Standard set up Nginx
+ENV NGINX_VERSION 1.13.12-1~stretch
+ENV NJS_VERSION   1.13.12.0.2.0-1~stretch
+
+RUN set -x \
 	&& apt-get update \
-	&& apt-get install -y ca-certificates nginx=${NGINX_VERSION} gettext-base \
-	&& rm -rf /var/lib/apt/lists/*
+	&& apt-get install --no-install-recommends --no-install-suggests -y gnupg1 apt-transport-https ca-certificates \
+	&& \
+	NGINX_GPGKEY=573BFD6B3D8FBC641079A6ABABF5BD827BD9BF62; \
+	found=''; \
+	for server in \
+		ha.pool.sks-keyservers.net \
+		hkp://keyserver.ubuntu.com:80 \
+		hkp://p80.pool.sks-keyservers.net:80 \
+		pgp.mit.edu \
+	; do \
+		echo "Fetching GPG key $NGINX_GPGKEY from $server"; \
+		apt-key adv --keyserver "$server" --keyserver-options timeout=10 --recv-keys "$NGINX_GPGKEY" && found=yes && break; \
+	done; \
+	test -z "$found" && echo >&2 "error: failed to fetch GPG key $NGINX_GPGKEY" && exit 1; \
+	apt-get remove --purge --auto-remove -y gnupg1 && rm -rf /var/lib/apt/lists/* \
+	&& dpkgArch="$(dpkg --print-architecture)" \
+	&& nginxPackages=" \
+		nginx=${NGINX_VERSION} \
+		nginx-module-xslt=${NGINX_VERSION} \
+		nginx-module-geoip=${NGINX_VERSION} \
+		nginx-module-image-filter=${NGINX_VERSION} \
+		nginx-module-njs=${NJS_VERSION} \
+	" \
+	&& case "$dpkgArch" in \
+		amd64|i386) \
+# arches officialy built by upstream
+			echo "deb https://nginx.org/packages/mainline/debian/ stretch nginx" >> /etc/apt/sources.list.d/nginx.list \
+			&& apt-get update \
+			;; \
+		*) \
+# we're on an architecture upstream doesn't officially build for
+# let's build binaries from the published source packages
+			echo "deb-src https://nginx.org/packages/mainline/debian/ stretch nginx" >> /etc/apt/sources.list.d/nginx.list \
+			\
+# new directory for storing sources and .deb files
+			&& tempDir="$(mktemp -d)" \
+			&& chmod 777 "$tempDir" \
+# (777 to ensure APT's "_apt" user can access it too)
+			\
+# save list of currently-installed packages so build dependencies can be cleanly removed later
+			&& savedAptMark="$(apt-mark showmanual)" \
+			\
+# build .deb files from upstream's source packages (which are verified by apt-get)
+			&& apt-get update \
+			&& apt-get build-dep -y $nginxPackages \
+			&& ( \
+				cd "$tempDir" \
+				&& DEB_BUILD_OPTIONS="nocheck parallel=$(nproc)" \
+					apt-get source --compile $nginxPackages \
+			) \
+# we don't remove APT lists here because they get re-downloaded and removed later
+			\
+# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
+# (which is done after we install the built packages so we don't have to redownload any overlapping dependencies)
+			&& apt-mark showmanual | xargs apt-mark auto > /dev/null \
+			&& { [ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; } \
+			\
+# create a temporary local APT repo to install from (so that dependency resolution can be handled by APT, as it should be)
+			&& ls -lAFh "$tempDir" \
+			&& ( cd "$tempDir" && dpkg-scanpackages . > Packages ) \
+			&& grep '^Package: ' "$tempDir/Packages" \
+			&& echo "deb [ trusted=yes ] file://$tempDir ./" > /etc/apt/sources.list.d/temp.list \
+# work around the following APT issue by using "Acquire::GzipIndexes=false" (overriding "/etc/apt/apt.conf.d/docker-gzip-indexes")
+#   Could not open file /var/lib/apt/lists/partial/_tmp_tmp.ODWljpQfkE_._Packages - open (13: Permission denied)
+#   ...
+#   E: Failed to fetch store:/var/lib/apt/lists/partial/_tmp_tmp.ODWljpQfkE_._Packages  Could not open file /var/lib/apt/lists/partial/_tmp_tmp.ODWljpQfkE_._Packages - open (13: Permission denied)
+			&& apt-get -o Acquire::GzipIndexes=false update \
+			;; \
+	esac \
+	\
+	&& apt-get install --no-install-recommends --no-install-suggests -y \
+						$nginxPackages \
+						gettext-base \
+	&& rm -rf /var/lib/apt/lists/* /etc/apt/sources.list.d/nginx.list \
+	\
+# if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
+	&& if [ -n "$tempDir" ]; then \
+		apt-get purge -y --auto-remove \
+		&& rm -rf "$tempDir" /etc/apt/sources.list.d/temp.list; \
+	fi
+
 # forward request and error logs to docker log collector
 RUN ln -sf /dev/stdout /var/log/nginx/access.log \
 	&& ln -sf /dev/stderr /var/log/nginx/error.log
-EXPOSE 80 443
-# Finished setting up Nginx
+EXPOSE 80
+# Removed the section that breaks pip installations
+# && apt-get remove --purge --auto-remove -y apt-transport-https ca-certificates 
+# Standard set up Nginx finished
 
 # Make NGINX run on the foreground
 RUN echo "daemon off;" >> /etc/nginx/nginx.conf