Configured CI

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: Linting, formatting, testing
+
+on:
+  push:
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs_on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v6
+      - name: Setup up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: "3.13"
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
+      - name: Install dependencies
+        run: uv sync --frozen
+      - name: Test with pytest
+        run: pytest backend/tests
+      - name: Run pre-commit
+        uses: pre-commit/actions@v3