Update Week02_Assignment.md

Week02_Assignment.md

@@ -5,6 +5,8 @@ Preparation:
    * `docker-compose down -v`   # removes volumes (test data you created will be removed)
    * `git pull`
    * `docker-compose -f docker-compose-week2-special.yml up --force-recreate -d`  # creates environment from another filename (rather than docker-compose.yml)
+   * Make sure your all containers are running you can check that with command `docker ps -a`
+    * To start a container `docker start xxxxx` (replace xxxxx with the first letters of the given container ID letters)
 
 Notes:
  * When updating Wasdat settings, Wasdat currently rejects settings update when bio missing.