Update base image

Dockerfile

@@ -1,19 +1,15 @@
-FROM ubuntu:trusty
+FROM ubuntu:bionic
 MAINTAINER Dave P
 
-# docker run -d -p 8822:22 -v /Users/dave/Documents/Code/docker_basessh/test:/etc/ssh/keys --name="basessh_test" shel
-
-# Create admin
 RUN useradd --create-home --groups sudo admin && \
     echo "admin:admin" | chpasswd && \
-    locale-gen en && \
     mkdir /var/run/sshd && \
     apt-get update -y && \
-    apt-get -y install openssh-server rsync screen tmux vim supervisor htop && \
+    apt-get -y install openssh-server rsync supervisor sudo && \
     rm -rf /etc/ssh/*_key* && \
     mkdir /etc/ssh/keys && \
     sed -i -E 's/HostKey \/etc\/ssh\//HostKey \/etc\/ssh\/keys\//' /etc/ssh/sshd_config && \
-    su -c "mkdir ~/.ssh /home/admin/persist" admin
+    su -c "mkdir ~/.ssh" admin
 
 COPY authorized_keys /home/admin/.ssh/authorized_keys
 
@@ -34,7 +30,5 @@ RUN chmod +x /start /start.d/regenerate-ssh /start.d/user-rc
 # Expose ssh
 EXPOSE 22
 
-VOLUME /home/admin/persist
-
 # Set boot command
 ENTRYPOINT ["/start"]