Add Docker instructions

Dockerfile

+FROM python:3.10-rc-alpine
+WORKDIR /app
+RUN apk add git # patch
+RUN pip install Django==3.1.2 djangorestframework==3.12.1
+RUN git clone https://lab.allmende.io/balkansalat/commoning-engine.git
+COPY ./settings.patch .
+# RUN patch --forward --reject-file=- --no-backup-if-mismatch ./commoning-engine/engine/settings.py ./settings.patch
+RUN python ./commoning-engine/manage.py migrate
+EXPOSE 8000
+CMD ["python", "./commoning-engine/manage.py", "runserver", "0.0.0.0:8000"]
+

README.md

@@ -20,4 +20,12 @@ Run the development server:
 python3 manage.py runserver
 ```
 
-Now you may visit [localhost:8000/api/v1/](localhost:8000/api/v1/) for access to the REST API and [localhost:8000/admin/](localhost:8000/admin/) for the admin backend. You may create an admin user by running `python3 manage.py createsuperuser`.
\ No newline at end of file
+Now you may visit [localhost:8000/api/v1/](localhost:8000/api/v1/) for access to the REST API and [localhost:8000/admin/](localhost:8000/admin/) for the admin backend. You may create an admin user by running `python3 manage.py createsuperuser`.
+
+# Run with Docker
+
+- start with `sudo docker-compose up -d`
+- create user with `sudo docker exec -ti app python /app/commoning-engine/manage.py createsuperuser`
+- if you encounter a Django error regarding the `ALLOWED_HOSTS` setting, uncomment the lines in the `Dockerfile` and build again with `sudo docker-compose up -d --build`
+
+

docker-compose.yml

+version: "2.0"
+
+services:
+  app:
+    build: .
+    container_name: commoning-engine
+    ports:
+      - "8000:8000"
+

settings.patch

+28c28
+< ALLOWED_HOSTS = []
+---
+> ALLOWED_HOSTS = ['*']