Switch to using alpine linux for docker container

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:2.7
+FROM node:4-alpine
 
 ENV PYTHONUNBUFFERED 1
 
@@ -6,31 +6,32 @@ RUN mkdir /code
 
 WORKDIR /code
 
-RUN apt-get update && apt-get install -y \
+RUN apk add --no-cache \
         python-dev \
-        libsasl2-dev \
-        libldap2-dev \
-        libpq-dev \
-        npm
+        py-pip \
+        postgresql-dev \
+        gcc \
+        musl-dev \
+        libffi-dev \
+        openldap-dev \
+        bash
 
 RUN npm install -g \
         --registry http://registry.npmjs.org/ \
         coffee-script \
         less@1.3
 
-RUN ln -s `which nodejs` /usr/bin/node
-
 RUN pip install --upgrade pip
 
 COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
 COPY requirements-dev.txt ./
 RUN pip install --no-cache-dir -r requirements-dev.txt
 
 COPY requirements-plugins.txt ./
 RUN pip install --no-cache-dir -r requirements-plugins.txt
 
-RUN pip install ipdb
-
 ADD . /code/
 
 ENTRYPOINT ["./docker-entrypoint.sh"]

requirements-dev.txt

@@ -1,4 +1,4 @@
--r requirements.txt
 coverage==4.2
 django_coverage_plugin==1.3.1
 mock==1.0.1
+ipdb

requirements.txt

@@ -13,7 +13,6 @@ django-filter==0.13
 django-jsonify==0.3.0
 django-mptt==0.6.0
 django-polymorphic==0.7.2
-django-redis==1.4.5
 django-smtp-ssl==1.0
 djangorestframework==2.4.8
 gunicorn==18.0