Merge pull request 'actions: services: cover the case when no container is specified' (#127) from earl-warren/end-to-end:wip-regression into main

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/127

actions/example-service/.forgejo/workflows/test.yml

@@ -2,7 +2,23 @@ on: [push]
 
 jobs:
   #
-  # No volume involved
+  # No volume involved & the container is implicit
+  #
+  simple-no-container:
+    runs-on: docker
+    services:
+      pgsql:
+        image: code.forgejo.org/oci/postgres:15
+        env:
+          POSTGRES_DB: test
+          POSTGRES_PASSWORD: postgres
+    steps:
+    - run: |
+       apt-get update -qq
+       apt-get install -y -qq  postgresql-client
+       PGPASSWORD=postgres psql -h pgsql -U postgres -c '\dt' test
+  #
+  # No volume involved & the container is explicit
   #
   simple:
     runs-on: docker