Provide easy way to run dbshell.

Author: proofit404

Dockerfile

@@ -1,9 +1,9 @@
 FROM python:3.8
 
-RUN mkdir /app/
+RUN apt-get update && apt-get install -y postgresql-client && rm -rf /var/lib/apt/lists/*
 
-WORKDIR /app/
+COPY requirements.txt /tmp/requirements.txt
 
-COPY requirements.txt requirements.txt
+RUN pip install -r /tmp/requirements.txt
 
-RUN pip install -r requirements.txt
+WORKDIR /app/