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Issue description:

f you look at the answers, in step 3.7 it is peforming an extra step which is exposing the port 3306. I don't think this is specified in the instructions. If you don't expose the port 3306, you're still getting the correct data by running curl so the grade script doesn't care about the end result, it cares if you have exposed the ports or not. There is no problem following the answers as long as the instruction are clear OR an error exist due to not exposing the port 3306: I did the exercise without exposing the ports , application works fine but grading fails 

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