check scripts recursively

.drone.yml

@@ -11,7 +11,7 @@ steps:
     image: koalaman/shellcheck-alpine:stable
     commands:
       - shellcheck --version
-      - find ./overlay -type f -exec grep -Eq '^#!(.*/|.*env +)(sh|bash|ksh)' {} \; | xargs shellcheck
+      - grep -ErlI '^#!(.*/|.*env +)(sh|bash|ksh)' ./overlay/ | xargs shellcheck
 
   - name: markdownlint
     image: thegeeklab/markdownlint-cli
@@ -120,6 +120,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 5674f13422f7e69803be61274fbe4ff4d84c38cdd1679fb297b705868f895ca5
+hmac: 2bea4511aa7215cd4fa21a264904e5b111c0acfa15c286b77117aa55e385f3db
 
 ...