Merge pull request jupyter#102 from parente/more-minimal-kernel

Remove build deps from minimal-kernel image

minimal-kernel/Dockerfile

@@ -8,36 +8,42 @@ USER root
 # Install all OS dependencies for fully functional notebook server
 ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get update && apt-get install -yq --no-install-recommends \
-    wget \
-    python3-dev \
-    build-essential \
-    python3-pip \
+    python3-setuptools \
     python3-zmq \
     && apt-get clean
 
 # Install Tini
-RUN wget --quiet https://github.com/krallin/tini/releases/download/v0.6.0/tini && \
+RUN python3 -c 'from urllib.request import urlretrieve; \
+urlretrieve("https://github.com/krallin/tini/releases/download/v0.6.0/tini", "tini")' && \
     echo "d5ed732199c36a1189320e6c4859f0169e950692f451c03e7854243b95f4234b *tini" | sha256sum -c - && \
     mv tini /usr/local/bin/tini && \
     chmod +x /usr/local/bin/tini
 
 # Configure environment
-ENV SHELL /bin/bash
 ENV KG_USER jovyan
 ENV KG_UID 1000
 
 # Create jovyan user with UID=1000
 RUN useradd -m -s /bin/bash -N -u $KG_UID $KG_USER
 
-# Install Kernel Gateway
-RUN pip3 install jupyter_kernel_gateway==0.2.0
+# Install modern pip then kernel gateway
+RUN apt-get update && \
+    apt-get install -yq --no-install-recommends \
+        build-essential \
+        python3-dev && \
+    easy_install3 pip && \
+    pip install jupyter_kernel_gateway==0.2.0 && \
+    apt-get remove --purge -y \
+        build-essential \
+        python3-dev && \
+    apt-get autoremove -y && \
+    apt-get clean
 
 # Configure container startup
-USER nobody
 EXPOSE 8888
 WORKDIR /tmp
 ENTRYPOINT ["tini", "--", "jupyter", "kernelgateway"]
 CMD ["--KernelGatewayApp.ip=0.0.0.0"]
 
 # Run container as jovyan
-USER jovyan
+USER jovyan