Update CI to use UV as well

.github/workflows/ci.yml

@@ -20,34 +20,34 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.11]
+        python-version: [3.12]
 
     steps:
-      - name: install just binary for running commands
+      - name: Install just binary for running commands
         uses: taiki-e/install-action@just
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - name: Use Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+      - name: Set up Python using the python specified in pyproject.toml
+        uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version-file: "pyproject.toml"
 
       - name: Install front end dependencies from front end directory
         run: |
           cd theme/static_src
           npm i
           cd ../../
 
-      - name: Install dependencies
-        run: |
-          python -m pip install pipenv
-          python -m pipenv install --dev
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+        with:
+          version: "0.4.18"
+
 
       - name: Run tests
         run: |
           just test
         env:
           CI: true
           DATABASE_URL: "postgres://postgres:postgres@localhost:5432/backend"
-          VUE_APP_SUPPORT_EMAIL: "[email protected]"