Add ssh.sh and fix assets folder

Dockerfile

@@ -1,6 +1,7 @@
 FROM ubuntu
 
-COPY assets assets
+RUN mkdir -p /home/ubuntu/playground
+COPY assets/* /home/ubuntu/playground/
 
 RUN apt update && apt install  openssh-server sudo -y
 RUN useradd -rm -d /home/ubuntu -s /bin/bash -g root -G sudo -u 1000 test 

ssh.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+ssh-keygen -f "/home/pop-os/.ssh/known_hosts" -R "[localhost]:2222"
+ssh -p 2222 test@localhost