Feature/improves multiple databases support (#561)

* feat: adds docker local files to ignore

* feat: adds replica key to django q settings

* feat: adds multiple database routers testing utility

* feat: ensures scheduler works with multiple databases and replicas

* feat: adds docker image to support containerized development

* refactor: removes unnecessary import

* style: improves import styling

* docs: adds replica setting to configure documentation

Dockerfile.dev

@@ -0,0 +1,40 @@
+# Sets the python version
+FROM python:3.9.5-slim
+
+# Allows the logs generated by python apps to be rendered in the terminal
+ENV PYTHONUNBUFFERED 1
+
+# Sets the default shell to bash
+ENV SHELL /bin/bash
+
+# Creates a non-root user
+RUN adduser --disabled-password docker
+
+# Upgrades pip
+RUN pip install --upgrade pip
+
+# Poetry project setup for development
+# Copies poetry requirements files
+COPY --chown=docker Dockerfile.dev requirements.txt* setup.py* ./
+
+RUN pip install -r requirements.txt
+
+RUN pip install pytest pytest-django codecov poetry
+
+# Clean up
+RUN apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /home/docker
+
+# Sets the binaries to path
+ENV PATH="/home/docker/.local/bin:${PATH}"
+
+# Copy in as non-root user, so permissions match what we need
+COPY --chown=docker:docker . .
+
+RUN python setup.py develop
+
+# Applies the container user to be non-root
+USER docker