Coder-Code-Server: Check if config file exists (#12758)

* Check if config file exists

* Apply suggestion from @tremor021

---------

Co-authored-by: Slaviša Arežina <58952836+tremor021@users.noreply.github.com>

tools/addon/coder-code-server.sh

@@ -89,17 +89,25 @@ VERSION=$(curl -fsSL https://api.github.com/repos/coder/code-server/releases/lat
   awk '{print substr($2, 3, length($2)-4) }')
 
 msg_info "Installing Code-Server v${VERSION}"
+
+if [ -f ~/.config/code-server/config.yaml ]; then
+  existing_config = true
+fi
+
 curl -fOL https://github.com/coder/code-server/releases/download/v"$VERSION"/code-server_"${VERSION}"_amd64.deb &>/dev/null
 dpkg -i code-server_"${VERSION}"_amd64.deb &>/dev/null
 rm -rf code-server_"${VERSION}"_amd64.deb
 mkdir -p ~/.config/code-server/
 systemctl enable -q --now code-server@"$USER"
+
+if [ $existing_config = false ]; then
 cat <<EOF >~/.config/code-server/config.yaml
 bind-addr: 0.0.0.0:8680
 auth: none
 password: 
 cert: false
 EOF
+fi
 systemctl restart code-server@"$USER"
 msg_ok "Installed Code-Server v${VERSION} on $hostname"