add drone file

.drone.yml

@@ -0,0 +1,25 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: build
+    image: node:current
+    environment:
+      REPOSITORY: beall-site
+      GIT_USER: inherentlee
+      GIT_TOKEN:
+        from_secret: GIT_TOKEN
+    commands:
+      - git config credential.helper '!f() { echo username=$GIT_USER; echo "password=$GIT_TOKEN"; };f'
+      - git submodule update --remote --init --merge
+      - npm install
+      - npm run build
+      - apt-get update && apt-get install -y rsync
+      - rsync -uavh _site/ $REPOSITORY --delete --exclude .git
+      - cd $REPOSITORY
+      - git checkout main
+      - git config --global --add safe.directory /drone/src/$REPOSITORY
+      - git add -A
+      - git commit -m "drone build $(TZ=':America/Los_Angeles' date)"
+      - git push