Moved bash code into .sh file

docker-start.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+# Start Redis in the background
+redis-server --daemonize yes
+
+# Start MySQL
+mysqld --user=mysql --datadir=/var/lib/mysql &
+
+# Wait for MySQL to be ready
+while ! mysqladmin ping -h localhost --silent; do
+  echo "Waiting for MySQL to be ready..."
+  sleep 2
+done
+echo "MySQL is ready!"
+
+# Run database migrations
+npx mikro-orm migration:up
+
+# Start the Node.js application in a tmux session
+tmux new-session -d -s nodeapp "node dist/server.js"
+echo "App is running in tmux session. Attach with: tmux attach-session -t nodeapp"
+
+# Keep container running
+tail -f /dev/null