add postgres client

Author: mjhea0

Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /usr/src/app
 RUN apt-get update \
   && apt-get -qq -y install netcat-traditional \
       libglib2.0-0 libsm6 libxext6 libxrender-dev libgomp1 \
-      graphviz graphviz-dev gcc \
+      graphviz graphviz-dev gcc postgresql-client \
   && apt-get -qq clean
 
 # install python dependencies
@@ -17,4 +17,4 @@ RUN pip install --upgrade pip
 RUN pip install --no-cache-dir -r requirements.txt
 
 # copy project
-COPY . /usr/src/app/
+COPY . /usr/src/app/