Make email template placeholders configurable via environment variables

Dockerfile

@@ -36,6 +36,12 @@ ENV CELERY_BROKER_URL=redis://localhost:6379/0
 ENV CELERY_RESULT_BACKEND=redis://localhost:6379/0
 ENV SCRAIBE_UPLOAD_DIR=/tmp/scraibe_uploads
 
+# Email and template configuration
+ENV EMAIL_CONTACT_ADDRESS=support@example.com
+ENV EMAIL_CSS_PATH=
+ENV SCRAIBE_TEMPLATES_DIR=/app/src/misc
+ENV SCRABIE_VERSION=0.1.1.dev
+
 # Copy and install Python dependencies
 COPY requirements.txt /app/src/requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt