Update Dockerfile

Dockerfile

@@ -27,7 +27,10 @@ RUN apt-get update && \
 # Now, create and switch to the non-root user
 RUN useradd -m -u 1000 user
 USER user
-ENV PATH="/home/user/.local/bin:$PATH" # Set PATH for the non-root user
+
+# Set PATH for the non-root user
+# Comments for ENV should be on a separate line above
+ENV PATH="/home/user/.local/bin:${PATH}"
 
 # Set the working directory in the container (as the non-root user)
 WORKDIR /app