Upgrade Dockerfile to stretch. (#2647)

Author: schmmd

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.6.8-jessie
+FROM python:3.6.8-stretch
 
 ENV LC_ALL=C.UTF-8
 ENV LANG=C.UTF-8
@@ -30,14 +30,10 @@ RUN apt-get update --fix-missing && apt-get install -y \
     libxrender1 \
     wget \
     libevent-dev \
-    build-essential && \
+    build-essential \
+    openjdk-8-jdk && \
     rm -rf /var/lib/apt/lists/*
 
-# Install Java.
-RUN echo "deb http://http.debian.net/debian jessie-backports main" >>/etc/apt/sources.list
-RUN apt-get update
-RUN apt-get install -y -t jessie-backports openjdk-8-jdk
-
 # Copy select files needed for installing requirements.
 # We only copy what we need here so small changes to the repository does not trigger re-installation of the requirements.
 COPY requirements.txt .

Dockerfile.pip

@@ -1,7 +1,7 @@
 # This Dockerfile creates an environment suitable for downstream usage of AllenNLP.
 # It creates an environment that includes a pip installation of allennlp.
 
-FROM python:3.6.8-jessie
+FROM python:3.6.8-stretch
 
 ENV LC_ALL=C.UTF-8
 ENV LANG=C.UTF-8