add drone ci script

.drone.yml

+---
+kind: pipeline
+type: docker
+name: Build-untagged
+steps:
+
+- name: Build-docker
+  image: docker:dind
+  volumes:
+  - name: dockersock
+    path: /var/run
+  environment:
+    DOCKER_PASSWORD:
+      from_secret: DOCKER_PASSWORD
+  commands:
+      - docker ps -a
+      - docker context create build
+      - docker buildx create build --use
+      - if [[ "$DRONE_BRANCH" == "master" ]]; then
+          tag="";
+          echo "Running on default branch '$DRONE_BRANCH': tag = 'latest'";
+        else
+          tag=":$DRONE_BRANCH";
+          echo "Running on branch '$DRONE_BRANCH': tag = $tag";
+        fi
+      - registry_image=$(echo "$DRONE_REPO" | awk -F "://" '{print $2}')
+      - registry_domain=$(echo "$registry_image" | awk -F "/" '{print $1}')
+      - echo $DOCKER_PASSWORD | docker login --username $DRONE_REPO_OWNER --password-stdin $registry_domain
+      - docker buildx build --platform linux/amd64,linux/arm,linux/arm64 --push --tag "$registry_image:$tag" .
+
+services:
+- name: docker
+  image: docker:dind
+  privileged: true
+  volumes:
+  - name: dockersock
+    path: /var/run
+
+volumes:
+- name: dockersock
+  temp: {}
+
+depends_on:
+- check
+
+trigger:
+  event:
+  - tag
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