diff --git a/packages/cli/cli.js b/packages/cli/cli.js
index f42d495..b170f09 100644
--- a/packages/cli/cli.js
+++ b/packages/cli/cli.js
@@ -1,5 +1,10 @@
+/* eslint-disable no-restricted-syntax */
+const fs = require('fs').promises
+const { exit } = require('process')
 const readline = require('readline')
 
+const RETURN_SYMBOL = '\u21B5'
+
 process.stdin.setRawMode(true)
 
 const rl = readline.createInterface({
@@ -8,13 +13,6 @@ const rl = readline.createInterface({
   terminal: false,
 })
 
-async function printResponses(responses, delay = 100) {
-  for (const response of responses) {
-    await printResponse(response, delay)
-  }
-  rl.close()
-}
-
 function waitForEnter() {
   return new Promise((resolve) => {
     rl.once('line', resolve)
@@ -35,18 +33,48 @@ function printResponse(response, delay) {
 
     waitForEnter().then(() => {
       clearInterval(timer)
-      process.stdout.write(response.slice(i) + '\n')
+      process.stdout.write(response.slice(i))
+      process.stdout.write('\n')
       resolve()
     })
   })
 }
 
-async function request() {
-  const { API_ENDPOINT, TOKEN, PWD, COMMAND, OUTPUT, EXIT_CODE } = process.env
+async function printResponses(responses, delay = 100) {
+  for (const response of responses) {
+    // eslint-disable-next-line no-await-in-loop
+    await printResponse(response + RETURN_SYMBOL, delay)
+  }
+  rl.close()
+}
+
+async function readOrNone(file) {
+  try {
+    return await fs.readFile(file, 'utf8')
+  } catch (err) {
+    return ''
+  }
+}
+
+async function main() {
+  const {
+    API_ENDPOINT,
+    TOKEN,
+    PWD,
+    CMD_NAME,
+    CMD_OUTPUT_FILE,
+    CMD_ERROR_FILE,
+    CMD_EXIT_CODE,
+  } = process.env
+  if (!CMD_NAME) exit(0)
+
+  const output = await readOrNone(CMD_OUTPUT_FILE)
+  const error = await readOrNone(CMD_ERROR_FILE)
   const payload = {
-    command: COMMAND,
-    output: OUTPUT,
-    exit_code: EXIT_CODE,
+    command: CMD_NAME,
+    output,
+    error,
+    exit_code: CMD_EXIT_CODE,
     token: TOKEN,
     pwd: PWD,
   }
@@ -67,4 +95,4 @@ async function request() {
   }
 }
 
-request()
+main()
diff --git a/packages/cli/index.js b/packages/cli/index.js
deleted file mode 100644
index 1e87ff1..0000000
--- a/packages/cli/index.js
+++ /dev/null
@@ -1,50 +0,0 @@
-import { stdin, stdout, exit } from 'process'
-import os from 'os'
-import pty from 'node-pty'
-
-stdin.setRawMode(true)
-stdin.resume()
-stdin.setEncoding('utf8')
-
-// Create a new pseudoterminal
-const shell = os.platform() === 'win32' ? 'powershell.exe' : 'bash'
-const ptyProcess = pty.spawn(shell, [], {
-  name: 'xterm-color',
-  cols: 80,
-  rows: 30,
-  cwd: process.env.HOME,
-  env: process.env,
-})
-
-// Listen for output data
-ptyProcess.on('data', function (data) {
-  // Intercept and process the output here
-  stdout.write(data)
-})
-
-// Write a command to the pseudoterminal
-ptyProcess.write('ls\r')
-
-let commandBuffer = ''
-
-stdin.on('data', (key) => {
-  if (key === '\u0004') {
-    exit()
-  } else if (key === '\r') {
-    // User pressed enter, log and execute the command
-    console.log('User command: ', commandBuffer)
-    commandBuffer = ''
-  } else if (key === '\u007F') {
-    // User pressed backspace, remove the last character from the buffer
-    commandBuffer = commandBuffer.slice(0, -1)
-  } else {
-    // Add the typed character to the command buffer
-    commandBuffer += key
-  }
-  ptyProcess.write(key)
-})
-
-// Listen for exit event
-ptyProcess.on('exit', function (exitCode) {
-  console.log('Process exited with code: ', exitCode)
-})
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 85f8223..d8c4598 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -3,8 +3,5 @@
   "version": "1.0.0",
   "main": "index.js",
   "license": "MIT",
-  "type": "module",
-  "dependencies": {
-    "node-pty": "^1.0.0"
-  }
+  "dependencies": {}
 }
diff --git a/server/quests/helloworld/Dockerfile b/server/quests/helloworld/Dockerfile
index 40265a8..8a8942d 100644
--- a/server/quests/helloworld/Dockerfile
+++ b/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" ]
diff --git a/server/quests/helloworld/home/.bashrc b/server/quests/helloworld/home/.bashrc
deleted file mode 100644
index 39e6094..0000000
--- a/server/quests/helloworld/home/.bashrc
+++ /dev/null
@@ -1,24 +0,0 @@
-# This function will be called before each command is executed
-preexec() {
-    [ -n "$COMP_LINE" ] && return  # do nothing if completing
-    [ "$BASH_COMMAND" = "$PROMPT_COMMAND" ] && return # do nothing if completing
-    export COMMAND="$BASH_COMMAND"
-
-    if [[ $COMMAND =~ ^(vim|top|less|more|nano) ]]; then
-        node /usr/local/bin/cli.js
-        return
-    fi
-
-    # Execute the command, capture output and exit code
-    export OUTPUT=$( { eval $COMMAND 2>&1; echo $? > /tmp/exit_code; }) 
-    export EXIT_CODE=$(cat /tmp/exit_code)
-
-    echo $OUTPUT
-    # Send command to the API
-    node /usr/local/bin/cli.js
-
-    BASH_COMMAND=""
-}
-
-# Install the trap
-trap 'preexec' DEBUG
diff --git a/server/quests/helloworld/home/.zshrc b/server/quests/helloworld/home/.zshrc
new file mode 100644
index 0000000..9369e80
--- /dev/null
+++ b/server/quests/helloworld/home/.zshrc
@@ -0,0 +1,36 @@
+PROMPT='%n@%m:%~%# '
+unsetopt CASE_GLOB
+setopt CHASE_LINKS
+emulate bash
+
+typeset -A cmd
+
+preexec() {
+    export CMD_START_TIME=$(date +%s%N)      # capture start time
+    export CMD_NAME=$1                   # capture command
+
+    # A list of interactive commands
+    interactive_commands=("vim" "nano" "top" "ssh" "less" "zsh" "bash")
+
+    # Check if the command is in the list of interactive commands
+    if [[ " ${interactive_commands[@]} " =~ " $1 " ]]; then
+        # If it is, just execute it normally
+        eval $1
+    else
+        # If it's not, execute it and redirect its output to a file
+        eval $1 > /tmp/cmd.out 2>/tmp/cmd.error
+    fi
+}
+
+precmd() {
+    export CMD_END_TIME=$(date +%s%N)   # capture end time
+    export CMD_EXIT_CODE=$?               # capture exit status
+    export CMD_OUTPUT_FILE=/tmp/cmd.out # read command output from file
+    export CMD_ERROR_FILE=/tmp/cmd.error
+
+    # Now run your Node.js script with the result as an argument
+    node /usr/local/bin/cli.js
+
+    rm /tmp/cmd.out /tmp/cmd.error 2>/dev/null # cleanup
+}
+
diff --git a/server/src/api/controllers/commandController.js b/server/src/api/controllers/commandController.js
index a886d23..7cfbb0c 100644
--- a/server/src/api/controllers/commandController.js
+++ b/server/src/api/controllers/commandController.js
@@ -7,6 +7,11 @@ export async function newCommand(req, res) {
   console.log('new command:', req.body)
   const { token, command, pwd, exit_code, output } = req.body
 
+  if (!command) {
+    res.status(400).json({ message: 'command is required' })
+    return
+  }
+
   let sessionId
   try {
     const decoded = await verifySessionJWT(token)
@@ -33,5 +38,7 @@ export async function newCommand(req, res) {
 
   await c.save()
 
-  res.status(201).end()
+  res.status(201).json({
+    responses: ['Hello, world!', 'How are you?'],
+  })
 }
diff --git a/server/src/utils/docker.js b/server/src/utils/docker.js
index cf7ee87..730a6e1 100644
--- a/server/src/utils/docker.js
+++ b/server/src/utils/docker.js
@@ -11,7 +11,6 @@ const containerOptions = {
   AttachStdout: true,
   AttachStderr: true,
   Tty: true,
-  Cmd: ['/bin/bash'],
   OpenStdin: true,
   StdinOnce: false,
   HostConfig: {
@@ -59,7 +58,7 @@ export async function attachContainer(container, { token }) {
     AttachStdin: true,
     AttachStdout: true,
     AttachStderr: true,
-    Cmd: ['/bin/bash'],
+    Cmd: ['/bin/zsh'],
     Tty: true,
     Env: [`TOKEN=${token}`, `API_ENDPOINT=http://app:3000`],
   })
diff --git a/server/src/utils/quest.js b/server/src/utils/quest.js
index 73f55bc..6ff8a40 100644
--- a/server/src/utils/quest.js
+++ b/server/src/utils/quest.js
@@ -17,6 +17,11 @@ export default async function loadAndUpdateQuests() {
 
   const quests = Promise.all(
     questNames.map(async (id) => {
+      // Check if id is directory
+      const stat = await fs.stat(path.join(questDirectory, id))
+      if (!stat.isDirectory()) {
+        return null
+      }
       const fullPath = path.join(questDirectory, id, 'README.md')
 
       try {
diff --git a/yarn.lock b/yarn.lock
index 88291a4..2a3ac1c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3612,13 +3612,6 @@ node-int64@^0.4.0:
   resolved "https://registry.yarnpkg.com/node-int64/-/node-int64-0.4.0.tgz#87a9065cdb355d3182d8f94ce11188b825c68a3b"
   integrity sha512-O5lz91xSOeoXP6DulyHfllpq+Eg00MWitZIbtPfoSEvqIHdl5gfcY6hYzDWnj0qD5tz52PI08u9qUvSVeUBeHw==
 
-node-pty@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/node-pty/-/node-pty-1.0.0.tgz#7daafc0aca1c4ca3de15c61330373af4af5861fd"
-  integrity sha512-wtBMWWS7dFZm/VgqElrTvtfMq4GzJ6+edFI0Y0zyzygUSZMgZdraDUMUhCIvkjhJjme15qWmbyJbtAx4ot4uZA==
-  dependencies:
-    nan "^2.17.0"
-
 node-releases@^2.0.12:
   version "2.0.13"
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.13.tgz#d5ed1627c23e3461e819b02e57b75e4899b1c81d"