add docker tls verify

.drone.star

@@ -100,7 +100,8 @@ def buildContainer(PHP_VERSION, ALPINE_VERSION, TESTING_REPO, PHP_SESSION):
         ],
         'environment': {
           'DOCKER_TLS_CERTDIR': '/certs',
-          'DOCKER_HOST': 'tcp://docker:2376'
+          'DOCKER_HOST': 'tcp://docker:2376',
+          'DOCKER_TLS_VERIFY': '1
         },
         'commands': [
           'source .env',