tmux script to generate multiple windows

start.sh

#!/bin/bash
SESSION="app"
PROJECT_PATH="~/projects/app"

cd $PROJECT_PATH

tmux new-session -d -s $SESSION
tmux rename-window -t 1 'backend'
tmux new-window -t $SESSION:2 -n 'frontend'
tmux new-window -t $SESSION:3 -n 'backend-src'
tmux new-window -t $SESSION:4 -n 'frontend-src'

tmux send-keys -t 'backend' "cd $PROJECT_PATH/backend" Enter "make dev" Enter
tmux send-keys -t 'frontend' "cd $PROJECT_PATH/frontend" Enter "make dev" Enter
tmux send-keys -t 'backend-src' "cd $PROJECT_PATH/backend" Enter "code app-backend.code-workspace &" Enter
tmux send-keys -t 'frontend-src' "cd $PROJECT_PATH/frontend" Enter "code app-frontend.code-workspace &" Enter

tmux attach-session -t $SESSION:3