test: add basic integration tests

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/moby/buildkit/util/testutil/dockerd/config.go

@@ -0,0 +1,16 @@
+package dockerd
+
+type Config struct {
+	Features map[string]bool `json:"features,omitempty"`
+	Mirrors  []string        `json:"registry-mirrors,omitempty"`
+	Builder  BuilderConfig   `json:"builder,omitempty"`
+}
+
+type BuilderEntitlements struct {
+	NetworkHost      bool `json:"network-host,omitempty"`
+	SecurityInsecure bool `json:"security-insecure,omitempty"`
+}
+
+type BuilderConfig struct {
+	Entitlements BuilderEntitlements `json:",omitempty"`
+}