fix base image

Author: oesteban

docker/Dockerfile_base

@@ -37,8 +37,13 @@ MAINTAINER The nipype developers https://github.com/nipy/nipype
 COPY docker/files/neurodebian.gpg /root/.neurodebian.gpg
 ENV DEBIAN_FRONTEND=noninteractive
 
-WORKDIR /opt
+# Installing curl
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends curl ca-certificates && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
+WORKDIR /opt
 # Installing freesurfer -- do it first so that it is cached early
 RUN curl -sSL https://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/6.0.0/freesurfer-Linux-centos6_x86_64-stable-pub-v6.0.0.tar.gz | tar zxv -C /opt \
     --exclude='freesurfer/trctrain' \
@@ -78,11 +83,11 @@ RUN echo "cHJpbnRmICJrcnp5c3p0b2YuZ29yZ29sZXdza2lAZ21haWwuY29tXG41MTcyXG4gKkN2dW
 # Prepare environment
 RUN curl -sSL http://neuro.debian.net/lists/xenial.us-ca.full >> /etc/apt/sources.list.d/neurodebian.sources.list && \
     apt-key add /root/.neurodebian.gpg && \
-    apt-key adv --refresh-keys --keyserver hkp://ha.pool.sks-keyservers.net 0xA5D32F012649A5A9 || true; \
-    apt-get update
+    apt-key adv --refresh-keys --keyserver hkp://ha.pool.sks-keyservers.net 0xA5D32F012649A5A9 || true
 
 # Installing general Debian utilities and Neurodebian packages (FSL, AFNI, git)
-RUN apt-get install -y --no-install-recommends \
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
                     fsl-core=5.0.9-1~nd+1+nd16.04+1 \
                     fsl-mni152-templates=5.0.7-2 \
                     afni=16.2.07~dfsg.1-2~nd16.04+1 \