chore: Ignore .env files and ensure unbuffered Python output in the Docker container.

.gitignore

@@ -8,3 +8,4 @@ wheels/
 
 # Virtual environments
 .venv
+.env

Dockerfile

@@ -1,5 +1,7 @@
 FROM python:3.13-slim
 
+ENV PYTHONUNBUFFERED=1
+
 WORKDIR /app
 
 COPY requirements.txt .
@@ -7,4 +9,4 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY sync_calendar.py .
 
-CMD ["python", "sync_calendar.py"]
+CMD ["python", "-u", "sync_calendar.py"]