feat: add support for specifying an initial-network property

This network is the network that is associated with the container on creation. If specified, then the bridge network is not attached to the service.

Only a single initial network can be specified at this time.

pre-delete

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+source "$PLUGIN_BASE_PATH/common/functions"
+
 source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
 source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/functions"
 set -eo pipefail