Sample dockerfile for alpine linux

depends/alpine_Dockerfile

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+# This is a sample Dockerfile to build Pillow on Alpine Linux
+# with all/most of the dependencies working.
+#
+# Tcl/Tk isn't detecting
+# Freetype has different metrics so tests are failing. 
+# sudo and bash are required for the webp build script. 
+
+FROM alpine
+USER root
+
+RUN apk --no-cache add python \
+                       build-base \
+                       python-dev \
+                       py-pip \
+                       # Pillow depenencies
+                       jpeg-dev \
+                       zlib-dev \
+                       freetype-dev \
+                       lcms2-dev \
+                       openjpeg-dev \
+                       tiff-dev \
+                       tk-dev \
+                       tcl-dev
+
+# install from pip, without webp
+#RUN LIBRARY_PATH=/lib:/usr/lib /bin/sh -c "pip install Pillow"
+
+# install from git, run tests, including webp
+RUN apk --no-cache add git \
+				   	   bash \
+					   sudo	
+					   
+RUN git clone https://github.com/wiredfool/Pillow.git /Pillow
+RUN pip install virtualenv && virtualenv /vpy && source /vpy/bin/activate && pip install nose
+
+RUN echo "#!/bin/bash" >> /test && \
+    echo "source /vpy/bin/activate && cd /Pillow && git checkout alpine-setup " >> test && \
+	echo "pushd depends && ./install_webp.sh && popd" >> test && \
+	echo "LIBRARY_PATH=/lib:/usr/lib make install && make test" >> test
+
+RUN chmod +x /test
+
+CMD ["/test"]