env: add start.sh

this script easily lets you start the compose file and backend in 1 sh script and stops it once it recieves a ctrl+c

start.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+terminate_script() {
+    echo "Stopping the script and killing background processes..."
+
+    docker compose down
+
+    # Kill all child processes (background processes)
+    pkill -P $$  # $$ refers to the PID of the script itself
+
+    exit 1
+}
+
+trap 'terminate_script' INT TERM HUP
+
+# Start the first process
+$(docker compose up -d)
+
+
+# Start the second process
+$(cargo dev)
+
+