environment variable names corrected
environment variable names corrected

The variable names in the readme was not the same as in the .env file.

BelieveC/classroom,BelieveC/classroom,mkcode/classroom,ConnorCartwright/classroom,ConnorCartwright/classroom,BelieveC/classroom,hackerkid/classroom,ConnorCartwright/classroom,mkcode/classroom,mkcode/classroom,hackerkid/classroom,hackerkid/classroom,BelieveC/classroom