Add docker support

- Allow setup script to get credentials from flags
- Add Dockerfile and docker_entrypoint
- Edit README for forked version

Dockerfile

@@ -0,0 +1,13 @@
+FROM python:3.7-bullseye
+
+ADD . /app
+WORKDIR /app
+
+RUN python3 setup.py install; \
+    chmod +x docker_entrypoint.sh; \
+    mkdir -p /data /root/.config; \
+    rm -rf docke.yml
+
+WORKDIR /data
+
+CMD ["/app/docker_entrypoint.sh"]