Pass dockerfile to build executor (#1606)

This allows testing actions with non standard dockerfile names

Signed-off-by: Aidan Jensen <aidan@artificial.com>

pkg/container/container_types.go

@@ -55,6 +55,7 @@ type Container interface {
 // NewDockerBuildExecutorInput the input for the NewDockerBuildExecutor function
 type NewDockerBuildExecutorInput struct {
 	ContextDir string
+	Dockerfile string
 	Container  Container
 	ImageTag   string
 	Platform   string

pkg/container/docker_build.go

@@ -45,12 +45,13 @@ func NewDockerBuildExecutor(input NewDockerBuildExecutorInput) common.Executor {
 			Remove:      true,
 			Platform:    input.Platform,
 			AuthConfigs: LoadDockerAuthConfigs(ctx),
+			Dockerfile:  input.Dockerfile,
 		}
 		var buildContext io.ReadCloser
 		if input.Container != nil {
 			buildContext, err = input.Container.GetContainerArchive(ctx, input.ContextDir+"/.")
 		} else {
-			buildContext, err = createBuildContext(ctx, input.ContextDir, "Dockerfile")
+			buildContext, err = createBuildContext(ctx, input.ContextDir, input.Dockerfile)
 		}
 		if err != nil {
 			return err