How to automatically start Tmux sessions when the server starts?

                    
#!/bin/bash

# Session for Cors
SESSION_CORS="cors"
WORKING_DIR_CORS="/var/www/cors_boosta__usr/data/www/cors.site.com"
COMMAND_CORS='node server.js'

# Session for echo-dev
SESSION_DEV="echo-dev"
WORKING_DIR_DEV="/var/www/dev_boosta_r_usr/data/www/dev.site.com"
COMMAND_DEV='export PATH=$PATH:$(npm config get prefix)/bin && bash -c "source ~/.bashrc && laravel-echo-server start"'

# Session for echo-prod
SESSION_PROD="echo-prod"
WORKING_DIR_PROD="/var/www/soft_boosta__usr/data/www/soft.site.com"
COMMAND_PROD='export PATH=$PATH:$(npm config get prefix)/bin && bash -c "source ~/.bashrc && laravel-echo-server start"'

# Function to start tmux session
start_tmux_session() {
  local session_name=$1
  local working_dir=$2
  local command=$3

  tmux has-session -t "$session_name" 2>/dev/null

  if [ $? != 0 ]; then
    tmux new-session -s "$session_name" -n 'server' -d
    tmux send-keys -t "$session_name" "cd \"$working_dir\"" C-m
    tmux send-keys -t "$session_name" "$command" C-m
  fi
}

# Start sessions
start_tmux_session "$SESSION_CORS" "$WORKING_DIR_CORS" "$COMMAND_CORS"
start_tmux_session "$SESSION_DEV" "$WORKING_DIR_DEV" "$COMMAND_DEV"
start_tmux_session "$SESSION_PROD" "$WORKING_DIR_PROD" "$COMMAND_PROD"