Add additionnal checker errors

types/Dojo/AssignmentCheckerError.ts

@@ -11,6 +11,8 @@ enum ExerciseCheckerError {
     COMPOSE_FILE_VOLUME_MISSING     = 209,
     DOCKERFILE_NOT_FOUND            = 210,
     COMPOSE_RUN_SUCCESSFULLY        = 211, // Yes, this is an error
+    ASSIGNMENT_MISSING              = 212,
+    BUILD_LINE_MISSING              = 213,
 }