Add ruff and add basic CI

.github/workflows/ci.yaml

@@ -0,0 +1,21 @@
+name: CI
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+
+jobs:
+  format:
+    runs-on: ubuntu-24.04
+    name: "Linting and formatting"
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run ruff check
+        uses: astral-sh/ruff-action@v2
+
+      - name: Run ruff format --check
+        uses: astral-sh/ruff-action@v2
+        with:
+          args: "format --check"

Makefile

@@ -0,0 +1,8 @@
+format:
+	ruff format
+
+lint:
+	ruff check
+
+lint-fix:
+	ruff check --fix

README.md

@@ -59,3 +59,13 @@ Finally, you're ready to start the application:
 
 Then open http://localhost:8007/admin to log in. Once redirected to the Django
 admin interface, go back to the main interface. You're now logged in.
+
+## Contributing
+
+Before committing make sure to install the git pre-commit hook to adhere to the
+codestyle.
+
+```bash
+ln -s ../../tools/githook/pre-commit .git/hooks/
+
+```

dev_requirements.txt

@@ -1,2 +1,4 @@
 -r requirements.txt
 uwsgi
+pycodestyle
+ruff

media/commitfest/css/commitfest.css

@@ -65,3 +65,7 @@ div.form-group div.controls input.threadpick-input {
 #annotateMessageBody.loading * {
     display: none;
 }
+
+.cfbot-summary img {
+    margin-top: -3px;
+}