CI configuration optimization.

.drone.yml

@@ -1,6 +1,6 @@
 kind: pipeline
 type: docker
-name: default
+name: validate-pr
 
 steps:
   - name: validate
@@ -8,7 +8,8 @@ steps:
     commands:
       - for DIR in */ ; do if [[ $(expr match "$DIR" "_.*") != 0 ]] ; then echo "SKIPPING $DIR" && continue; fi && test -f $DIR/.env.dist && cp $DIR/.env.dist $DIR/.env ; done
       - for DIR in */ ; do if [[ $(expr match "$DIR" "_.*") != 0 ]] ; then echo "SKIPPING $DIR" && continue; fi && echo $DIR && cd $DIR && docker-compose config && cd .. ; done
-    when:
-      event:
-        include:
-          - pull_request
+
+trigger:
+  event:
+    include:
+      - pull_request