DKR: Add bc for FreeSurfer recons

Author: mgxd

Dockerfile

@@ -114,6 +114,7 @@ ENV DEBIAN_FRONTEND="noninteractive" \
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
                     apt-utils \
+                    bc \
                     build-essential \
                     ca-certificates \
                     curl \