added procps utilities to base container

src/debian/Containerfile

@@ -24,7 +24,7 @@ RUN rm /etc/localtime && \
 # Install packages
 RUN apt update -y && \
     apt upgrade -y && \
-    apt install -y init sudo wget nano less man-db unzip rsync && \
+    apt install -y init sudo wget nano less man-db unzip rsync procps && \
     apt autoremove -y --purge && \
     apt clean -y