Add Github CI test workflow

.github/workflows/unit-tests.yaml

@@ -0,0 +1,40 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main, staging ]
+    paths:
+      - src/**
+  pull_request:
+    branches: [ main, staging ]
+    paths:
+      - src/**
+
+jobs:
+  test_back:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11"]
+    defaults:
+      run:
+        working-directory: ./
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install Package (Local)
+        run: |
+          python -m pip install --upgrade pip
+          pip install .
+      - name: Make envfile
+        uses: SpicyPizza/create-envfile@v1.3
+        with:
+          envkey_EXAMPLE: "example env value - if we will use it (?)"
+          directory: ./
+      - name: Run Tests
+        run: |
+          python -m unittest