Corrected command to run tests in Goss

Jenkinsfile

@@ -42,7 +42,7 @@ pipeline {
                     '''
                     
                     withEnv(["GOSS_OPTS=-f junit", 'GOSS_PATH=./goss', "SQLALCHEMY_DATABASE_URI=sqlite:///:memory:"]) {
-                        sh label: 'run image tests', script: './dgoss run ${DOCKER_IMAGE} > goss_junit.xml'
+                        sh label: 'run image tests', script: './dgoss run -e SQLALCHEMY_DATABASE_URI=sqlite:///:memory: ${DOCKER_IMAGE} > goss_junit.xml'
                     }
                 }
             }