feat: change to use Zsh

* show message from server response
* send output and error to server

server/quests/helloworld/Dockerfile

@@ -3,9 +3,10 @@ FROM node:latest
 RUN apt-get update && apt-get install -y \
   curl \
   vim \
+  zsh \
   jq
 
-RUN adduser --disabled-password --gecos '' rudeus
+RUN adduser --disabled-password --gecos '' --shell /bin/zsh rudeus
 
 USER rudeus
 
@@ -15,4 +16,4 @@ COPY ./server/quests/helloworld/home /home/rudeus/
 
 COPY ./packages/cli/cli.js /usr/local/bin/cli.js
 
-CMD [ "/bin/bash" ]
+CMD [ "/bin/zsh" ]