Minor fix

Author: Chuxel

containers/go/.devcontainer/Dockerfile

@@ -66,3 +66,7 @@ RUN apt-get update \
     && apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/* /go/src
+
+# Switch back to dialog for any ad-hoc use of apt-get
+ENV DEBIAN_FRONTEND=dialog
+