Enhance Dockerfile: create writable logs directory and set log directory environment variable

Dockerfile

@@ -41,11 +41,16 @@ RUN poetry install --only=main --no-dev
 # Copy application code
 COPY app/ ./app/
 
-# Create non-root user
+# Create non-root user and writable logs directory
 RUN useradd --create-home --shell /bin/bash app \
-    && chown -R app:app /app
+    && mkdir -p /tmp/logs \
+    && chown -R app:app /app /tmp/logs
+
 USER app
 
+# Set log directory environment variable
+ENV LOG_DIR=/tmp/logs
+
 # Expose port
 EXPOSE 8000