fixing drone

.drone.yml

@@ -11,6 +11,11 @@ steps:
       - ./gradlew build
       - ./gradlew test
 
+  - name: syntax_check
+    image: gradle:jdk11-alpine 
+    commands:
+      - ./gradlew check
+
 ---
 kind: pipeline
 type: docker
@@ -23,13 +28,14 @@ steps:
       - name: archives
         path: /build
     commands:
+      - apk add --no-cache git
       - tar cvzf /build/$(git log -n 1 --format="%h")_school_archive.gz.tar app/ gradle/ gradlew/ gradlew.bat README.md settings.gradle
     trigger:
-      - branch:
-          - master
-        event:
-          - include:
-            - push
+      branch:
+        - master
+      event:
+        exclude:
+          - pull_request
 volumes: 
   - name: archives
     host:
@@ -38,6 +44,6 @@ depends_on:
   - Check_Requirement
 ---
 kind: signature
-hmac: 82ce5e9bc63570a5614c4e7b3ddc888fadb36f7660ab0ab521d0cda3c5842e05
+hmac: 7560f21ac377e3e6d1c30a67cf6a1052574560d57bbe98cc8017ebcaf19cfc99
 
 ...