fix: mount docker sock in CI job, remove obsolete version

.forgejo/workflows/test.yml

@@ -8,6 +8,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    container:
+      options: -v /var/run/docker.sock:/var/run/docker.sock
     steps:
       - uses: actions/checkout@v4
 

docker-compose.yml

@@ -1,5 +1,3 @@
-version: "3.9"
-
 services:
   t2s:
     build: ./app