Limit compilation concurrency using MAX_JOBS=1 to prevent OOM

Dockerfile

@@ -14,6 +14,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 COPY requirements.txt .
 
 # Install dependencies
+ENV MAX_JOBS=1
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy the rest of the application code