examples/docker-compose: fix false positive

because of the -x the success string was always in the output and the
workflow .forgejo/workflows/example-docker-compose.yml would always
report success, even if it fails

examples/docker-compose/compose-demo-workflow.yml

@@ -13,7 +13,7 @@ services:
       runner-register:
         condition: service_completed_successfully
     command: >-
-      sh -xc '
+      sh -ec '
       apk add --quiet git curl jq ;
       mkdir -p /srv/demo ;
       cd /srv/demo ;
@@ -29,10 +29,10 @@ services:
         sleep 5 ;
       done ;
       sha=`git rev-parse HEAD` ;
-      while : ; do
+      for delay in 1 1 1 1 2 5 5 10 10 10 15 ; do
         curl -sS -f http://forgejo:3000/api/v1/repos/root/test/commits/$$sha/status | jq --raw-output .state | tee status ;
-        grep success status && break ;
-        sleep 5 ;
-      done ;
-      echo DEMO WORKFLOW SUCCESS
+        if grep success status ; then echo DEMO WORKFLOW SUCCESS && break ; fi ;
+        if grep failure status ; then echo DEMO WORKFLOW FAILURE && break ; fi ;
+        sleep $$delay ;
+      done
       '

examples/docker-compose/compose-forgejo-and-runner.yml

@@ -56,7 +56,7 @@ services:
       - /srv/runner-data:/data
     user: 0:0
     command: >-
-      bash -c '
+      bash -ec '
       while : ; do
         forgejo-runner create-runner-file --instance http://forgejo:3000 --name runner --secret {SHARED_SECRET} && break ;
         sleep 1 ;