Made the image smaller

Fixed bcrypt
Added requirements.txt

Dockerfile

@@ -1,21 +1,42 @@
-FROM python:3.6-alpine
+FROM alpine:3.8 AS base
 
-# Build
-COPY . /code
-WORKDIR /code
-
-RUN addgroup -S -g 9898 pypiserver && \
-    adduser -S -u 9898 -G pypiserver pypiserver && \
-    apk add py-bcrypt && \
-    python setup.py install && \
-    pip install passlib && \
-    cd / && \
-    rm -rf /code && \
-    mkdir -p /data/packages && \
-    chown -R pypiserver:pypiserver /data/packages && \
+# Install python and modules that can't be installed via pip
+# Delete the uncompiled variants to shave off ~10MB of the docker file
+RUN addgroup -S -g 9898 pypiserver \
+    && adduser -S -u 9898 -G pypiserver pypiserver \
+    && mkdir -p /data/packages \
+    && chown -R pypiserver:pypiserver /data/packages \
     # Set the setgid bit so anything added here gets associated with the
     # pypiserver group
-    chmod g+s /data/packages
+    && chmod g+s /data/packages \
+    && apk --no-cache add python py2-bcrypt py2-cffi py2-six \
+    && find /usr -name "*.py" ! -name "__*" -exec rm {} \;
+
+FROM base as builder
+
+# Copy the requirements and install them
+# Do this in a separate image in a separate directory
+# to not have all the pip stuff in the final image
+COPY requirements.txt /requirements.txt
+
+# Install python packages
+RUN apk add --no-cache py2-pip \
+    && mkdir /install \
+    && pip install --prefix=/install --requirement /requirements.txt \
+    && find /install -name "*.py" ! -name "__*" -exec rm {} \;
+
+FROM base
+
+# Copy the libraries installed via pip
+COPY --from=builder /install /usr
+
+COPY . /code
+
+RUN apk add py2-setuptools \
+    && cd code \
+    && python setup.py install \
+    && cd / \
+    && rm -rf code
 
 VOLUME /data/packages
 USER pypiserver

requirements.txt

@@ -0,0 +1 @@
+passlib==1.7.1