updated dockerfile and docker-compose

Author: fermayo

Dockerfile

@@ -4,12 +4,13 @@ FROM python:2.7
 # Set the application directory
 WORKDIR /app
 
-# Copy our code from the current folder to /app inside the container
-ADD . /app
-
 # Install our requirements.txt
+ADD requirements.txt /app/requirements.txt
 RUN pip install -r requirements.txt
 
+# Copy our code from the current folder to /app inside the container
+ADD . /app
+
 # Make port 5000 available for links and/or publish
 EXPOSE 80