Squashed commit message

scripts/wait_for_mysql.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+MYSQL_SERVICE="mysql"
+
+function check_mysql {
+  docker compose exec $MYSQL_SERVICE mysqladmin ping --silent
+}
+
+echo "Waiting for MySQL..."
+
+MAX_WAIT_TIME=60
+WAIT_TIME=0
+
+while ! check_mysql; do
+  if [ $WAIT_TIME -ge $MAX_WAIT_TIME ]; then
+    echo "MySQL has not been available for $MAX_WAIT_TIME secods. Exit."
+    exit 1
+  fi
+  sleep 1
+  WAIT_TIME=$((WAIT_TIME + 1))
+done
+
+sleep 5
+echo "MySQL ready."