Added the docker files and ansible playbooks for two instances namely pkl and chd.

docker/app/worker.Dockerfile

@@ -0,0 +1,24 @@
+FROM python:latest
+LABEL maintainer="Amritanshu <docker@tanshu.com>"
+RUN git clone --single-branch --depth 1 --branch latest https://git.tanshu.com/tanshu/barker.git /repo
+RUN mkdir /app && mv /repo/barker/* /app
+WORKDIR /app
+
+# Install Poetry
+RUN curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | POETRY_HOME=/opt/poetry python && \
+    cd /usr/local/bin && \
+    ln -s /opt/poetry/bin/poetry && \
+    poetry config virtualenvs.create false
+
+# Allow installing dev dependencies to run tests
+ARG INSTALL_DEV=false
+RUN bash -c "if [ $INSTALL_DEV == 'true' ] ; then poetry install --no-root ; else poetry install --no-root --no-dev ; fi"
+
+ENV C_FORCE_ROOT=1
+ENV PYTHONPATH=/app
+
+RUN chmod 777 /app/worker-start.sh \
+    && ln -s /app/worker-start.sh /usr/local/bin/worker-start.sh \
+    && ln -s /app/worker-start.sh /
+
+CMD ["bash", "worker-start.sh"]