Update Dockerfile

Author: levkk

Dockerfile

@@ -7,4 +7,5 @@ FROM debian:buster-slim
 COPY --from=builder /app/target/release/pgcat /usr/bin/pgcat
 COPY --from=builder /app/pgcat.toml /etc/pgcat/pgcat.toml
 WORKDIR /etc/pgcat
+ENV RUST_LOG=info
 ENTRYPOINT ["/usr/bin/pgcat"]