Dockerize app and update TravisCI file

.travis.yml

+sudo: required
+
 language: python
 
 python:
   - "3.6"
 
+services:
+  - docker
+
+before_install:
+  # run Docker image in detached mode to be able to issue further commands
+  - docker-compose up -d
+  - docker exec -it oserbackend_app_1 bash
+
 before_script:
-  - cd oser_backend
   - python manage.py makemigrations
   - python manage.py migrate
 

Dockerfile

+from python:3.6
+EXPOSE 8000
+ADD . /oser-backend
+RUN pip3 install -r oser-backend/requirements.txt
+WORKDIR /oser-backend/oser_backend
+RUN python3 manage.py test
+CMD python3 manage.py runserver 0.0.0.0:8000

docker-compose.yml

+version: '3'
+
+services:
+  app:
+    build: .
+    ports:
+      - 8000:8000