Update Dockerfile

Dockerfile

@@ -1,14 +1,21 @@
 FROM python:3.10-slim
 
-# Install Stockfish as root during build
+# Install Stockfish as root
 RUN apt-get update && apt-get install -y stockfish curl && rm -rf /var/lib/apt/lists/*
 
-WORKDIR /code
-COPY . .
+# Create a non-root user and set up the working directory
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:/usr/games:$PATH
+
+WORKDIR $HOME/app
+
+# Copy files and ensure the 'user' owns them
+COPY --chown=user . .
+
 RUN pip install --no-cache-dir flask gunicorn chess
 
-# Ensure script is executable
+# Explicitly find and export Stockfish path
 RUN chmod +x setup.sh
-
-# Set the entrypoint
 CMD ["./setup.sh"]