[satlab]: Set default network to be used for Servod container

Change-Id: I63e379429f6d20058578e7cd1e70326f18a784b1

Bug:b:217258787
Test:None
Change-Id: Ifd2bf881a214beb222a8852513011421908afdf0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/satlab/+/3448698
Reviewed-by: Otabek Kasimov <otabek@google.com>
Reviewed-by: Anh Le <anhdle@chromium.org>
Commit-Queue: Prasad Vuppalapu <prasadv@chromium.org>
Tested-by: Prasad Vuppalapu <prasadv@chromium.org>
diff --git a/src/dockerfiles/compose/docker-compose.yaml b/src/dockerfiles/compose/docker-compose.yaml
index db19b7e..dee7c95 100644
--- a/src/dockerfiles/compose/docker-compose.yaml
+++ b/src/dockerfiles/compose/docker-compose.yaml
@@ -32,6 +32,7 @@
       - DOCKER_DRONE_CACHESERVER_IP=192.168.100.1
       - SERVOD_CONTAINER_LABEL=release
       - DOCKER_SERVOD_DEBUG_MODE=0
+      - DOCKER_DEFAULT_NETWORK=default_satlab
     privileged: true
     hostname: ${DRONE_HOSTNAME:-satlab-drone}
     restart: always