Merge pull request #38 from harshjv/master

Follow best practices for Dockerfile

README.md

@@ -484,7 +484,7 @@ To use, place your images in `openface` on your host and
 access them from the shared Docker directory.
 
 ```
-docker build -t openface .
+docker build -t openface ./docker
 docker run -t -i -v $PWD:/openface openface /bin/bash
 cd /openface
 ./demos/compare.py images/examples/{lennon*,clapton*}
@@ -505,7 +505,7 @@ eval $(docker-machine env default)
 ## By hand
 Be sure you have checked out the submodules and downloaded the models as
 described above.
-See the [Dockerfile](Dockerfile) as a reference.
+See the [Dockerfile](docker/Dockerfile) as a reference.
 
 This project uses `python2` because of the `opencv`
 and `dlib` dependencies.

docker/Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:14.04
 MAINTAINER Brandon Amos <brandon.amos.cs@gmail.com>
-RUN apt-get update
-RUN apt-get install -y \
+
+RUN apt-get update && apt-get install -y \
     build-essential \
     cmake \
     curl \
@@ -19,7 +19,9 @@ RUN apt-get install -y \
     python-dev \
     python-pip \
     wget \
-    zip
+    zip \
+    && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
 RUN pip2 install numpy scipy pandas
 RUN pip2 install scikit-learn scikit-image