:gear: only deploy when activity detected on master

.drone.yml

 
 # push_deploy_key: id_rsa from DRONE host machine
 
-
 ################
 # Build & Test #
 ################
 name: run_tests
 
 steps:
-# Test the vue theme
-- name: test
-  image: node
-  commands:
-  - pwd
-  - cd ./vue-theme
-  - npm install
-  - npm test
-  volumes:
-  # Link node_modules cache from host filesystem into container at the expected location
-  - name: node_cache
-    path: /drone/src/vue-theme/node_modules
+    # Test the vue theme
+    - name: test
+      image: node
+      commands:
+          - pwd
+          - cd ./vue-theme
+          - npm install
+          - npm test
+      volumes:
+          # Link node_modules cache from host filesystem into container at the expected location
+          - name: node_cache
+            path: /drone/src/vue-theme/node_modules
 
-- name: build
-  image: node
-  commands:
-  - cd ./vue-theme
-  - rm -Rf ./build/*
-  - npx browserslist@latest --update-db
-  - npm run build
-  - ls ./build
-  environment:
-    NODE_OPTIONS: --openssl-legacy-provider
-  volumes:
-    # Link node_modules cache from host filesystem into container at the expected location
-    - name: node_cache
-      path: /drone/src/vue-theme/node_modules
     - name: build
-      path: /drone/src/vue-theme/build
+      image: node
+      commands:
+          - cd ./vue-theme
+          - rm -Rf ./build/*
+          - npx browserslist@latest --update-db
+          - npm run build
+          - ls ./build
+      environment:
+          NODE_OPTIONS: --openssl-legacy-provider
+      volumes:
+          # Link node_modules cache from host filesystem into container at the expected location
+          - name: node_cache
+            path: /drone/src/vue-theme/node_modules
+          - name: build
+            path: /drone/src/vue-theme/build
 
 volumes:
-  - name: node_cache
-    host:
-      path: /tmp/cache/drone/node_modules
-  - name: build
-    host:
-      path: /tmp/cache/drone/build
+    - name: node_cache
+      host:
+          path: /tmp/cache/drone/node_modules
+    - name: build
+      host:
+          path: /tmp/cache/drone/build
 ---
 ########################
 # Deploy to Production #
 kind: pipeline
 name: deploy
 depends_on:
-  # Must run after the first pipeline
-  - run_tests
+    # Must run after the first pipeline
+    - run_tests
 trigger:
-  status:
-    # Only runs if the first pipeline was fully successful
-    - success
+    status:
+        # Only runs if the first pipeline was fully successful
+        - success
+    branch:
+        - master
 
 steps:
-# post-receive hook
-- name: push commit
-  image: appleboy/drone-git-push:0.2.0-linux-amd64
-  settings:
-    branch: master
-    remote: maeda@143.110.234.41:/opt/staging/vue-wp.git
-    remote_name: staging
-    force: true
-    ssh_key:
-      # !: id_rsa from DRONE machine
-      from_secret: push_deploy_key
+    # post-receive hook
+    - name: push commit
+      image: appleboy/drone-git-push:0.2.0-linux-amd64
+      settings:
+          branch: master
+          remote: maeda@143.110.234.41:/opt/staging/vue-wp.git
+          remote_name: staging
+          force: true
+          ssh_key:
+              # !: id_rsa from DRONE machine
+              from_secret: push_deploy_key
 
 volumes:
-  - name: node_cache
-    host:
-      path: /tmp/cache/drone/node_modules
-  - name: build
-    host:
-      path: /tmp/cache/drone/build
+    - name: node_cache
+      host:
+          path: /tmp/cache/drone/node_modules
+    - name: build
+      host:
+          path: /tmp/cache/drone/build