ci: add docker config to enable pulls from private

docker registry

.drone.yml

@@ -36,6 +36,8 @@ steps:
   - name: deploy
     image: registry.greenbaum.cloud/library/triton-docker
     environment:
+      DOCKER_CONFIG:
+        from_secret: docker_config
       TRITON_SSH_KEY:
         from_secret: triton_ssh_key
       TRITON_ACCOUNT:
@@ -44,8 +46,9 @@ steps:
       TRITON_KEY_ID: 59:9f:5a:6f:c4:e2:3b:32:7f:13:1f:de:b7:59:80:85
       PROJECT_NAME: miomspace
     commands:
-      - mkdir -p /home/node/.ssh
+      - mkdir -p /home/node/.ssh /home/node/.config/docker
       - echo -e "$TRITON_SSH_KEY" > /home/node/.ssh/id_rsa
+      - echo -e "$DOCKER_CONFIG" > /home/node/.config/docker/config.json
       - /usr/local/bin/docker-entrypoint.sh ./deploy.sh $DRONE_TAG
 
 trigger: