Add build output option (#11)

Fixes #6

Also updates dependencies

Co-authored-by: Lauris BH <lauris@nix.lv>
Reviewed-on: https://codeberg.org/woodpecker-plugins/plugin-docker-buildx/pulls/11
Reviewed-by: anbraten <anbraten@noreply.codeberg.org>
Co-authored-by: Lauris BH <lafriks@noreply.codeberg.org>
Co-committed-by: Lauris BH <lafriks@noreply.codeberg.org>

plugin/docker.go

@@ -111,6 +111,9 @@ func commandBuild(build Build, dryrun bool) *exec.Cmd {
 	if build.Target != "" {
 		args = append(args, "--target", build.Target)
 	}
+	if build.Output != "" {
+		args = append(args, "--output", build.Output)
+	}
 	if build.Quiet {
 		args = append(args, "--quiet")
 	}