builder/internals: set up network as bridge

Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com>

builder/internals.go

@@ -561,6 +561,7 @@ func (b *Builder) create() (*daemon.Container, error) {
 		CgroupParent: b.cgroupParent,
 		Memory:       b.memory,
 		MemorySwap:   b.memorySwap,
+		NetworkMode:  "bridge",
 	}
 
 	config := *b.Config