drone: do not attempt to deploy pull requests

.drone.yml

@@ -87,19 +87,80 @@ steps:
       event:
       - push
 
-  - name: build
+# pr dry run
+  - name: api-pr
+    image: plugins/docker
+    settings:
+      registry: registry.itzana.me
+      repo: registry.itzana.me/strafesnet/maptest-api
+      tags:
+        - ${DRONE_BRANCH}-${DRONE_BUILD_NUMBER}
+        - ${DRONE_BRANCH}
+      username:
+        from_secret: REGISTRY_USER
+      password:
+        from_secret: REGISTRY_PASS
+      dockerfile: Containerfile
+      context: .
+    environment:
+      PLUGIN_NO_PUSH: true
+    when:
+      event:
+      - pull_request
+
+  - name: frontend-pr
+    image: plugins/docker
+    settings:
+      registry: registry.itzana.me
+      repo: registry.itzana.me/strafesnet/maptest-frontend
+      tags:
+        - ${DRONE_BRANCH}-${DRONE_BUILD_NUMBER}
+        - ${DRONE_BRANCH}
+      username:
+        from_secret: REGISTRY_USER
+      password:
+        from_secret: REGISTRY_PASS
+      dockerfile: web/Containerfile
+      context: web
+    environment:
+      PLUGIN_NO_PUSH: true
+    when:
+      event:
+      - pull_request
+
+  - name: validator-pr
+    image: plugins/docker
+    settings:
+      registry: registry.itzana.me
+      repo: registry.itzana.me/strafesnet/maptest-validator
+      tags:
+        - ${DRONE_BRANCH}-${DRONE_BUILD_NUMBER}
+        - ${DRONE_BRANCH}
+      username:
+        from_secret: REGISTRY_USER
+      password:
+        from_secret: REGISTRY_PASS
+      dockerfile: validation/Containerfile
+      context: validation
+    environment:
+      PLUGIN_NO_PUSH: true
+    when:
+      event:
+      - pull_request
+
+  - name: build-pr
     image: alpine
     commands:
       - echo "Success!"
     depends_on:
-      - api
-      - frontend
-      - validator
+      - api-pr
+      - frontend-pr
+      - validator-pr
     when:
       event:
       - pull_request
 ---
 kind: signature
-hmac: e9c41c6f3cbf8b627905ff94c80a8692e7589d8ee938a724b6bec4e61d764058
+hmac: 5db97b6d491f3a3742784d78a2dbdba0dc5f150de6666d5776fb3c2efa22d6b5
 
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