Install olympia after we mount /code

Dockerfile

@@ -57,7 +57,6 @@ RUN cd /pip && \
         --find-links https://pyrepo.stage.mozaws.net/olympia/ \
         --no-index --no-deps \
         -r requirements/docker.txt && \
-    pip install -e /code && \
     rm -r build cache
 
 # Install the node_modules.
@@ -68,6 +67,8 @@ RUN npm install
 COPY . /code
 WORKDIR /code
 
+RUN pip install -e . /code
+
 # Preserve bash history across image updates.
 # This works best when you link your local source code
 # as a volume.