Update development docker setup

Dockerfile

@@ -1,8 +1,19 @@
-FROM python:3.7
+FROM python:3.7-alpine
 ENV PYTHONUNBUFFERED 1
-ENV IS_DOCKER 1
-RUN mkdir /code
-WORKDIR /code
-ADD requirements.txt /code/
-RUN env
-ADD . /code/
+ENV IS_DOCKER 0
+WORKDIR /app
+COPY requirements.txt ./
+COPY requirements.production.txt ./
+COPY . ./
+
+# uWSGI, gunicorn etc.
+RUN apk add --no-cache python3-dev build-base linux-headers pcre-dev openssl bash \
+  # PSQL
+  && apk add --no-cache postgresql-dev \
+  # Pillow
+  && apk add --no-cache jpeg-dev zlib-dev \
+  && pip install --upgrade pip \
+  && pip install -r requirements.txt \
+  && pip install -r requirements.production.txt
+
+RUN python manage.py collectstatic --noinput