Add `ci.yml` file for CI

.github/workflows/ci.yml

@@ -10,6 +10,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Run linter
         uses: psf/black@stable
+        with:
+          options: "--check —verbose -l 120"
+          src: "./app"
+          version: "~= 22.0"
   mypy:
     name: Mypy
     runs-on: ubuntu-latest
@@ -35,6 +39,7 @@ jobs:
           python-version: 3.10
       - name: Install dependencies
         run: |
-          pip install 
+          pip install pytest
+          pip install -r app/requirements.txt
       - name: Run tests
         run: pytest