Add a workflow for unit testing

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: doccano CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install pipenv
+        pipenv sync --dev
+    - name: Run migrations
+      run: |
+        pipenv run wait_for_db
+        pipenv run migrate
+      working-directory: ./app
+    - name: Run tests
+      run: |
+        pipenv run test
+      working-directory: ./app

Pipfile

@@ -44,3 +44,9 @@ lockfile = "*"
 
 [requires]
 python_version = "3.8"
+
+[scripts]
+isort = "isort . -c"
+wait_for_db = "python manage.py wait_for_db"
+test = "python manage.py test api.tests"
+migrate = "python manage.py migrate"