diff --git a/Dockerfile b/.devcontainer/Dockerfile
similarity index 100%
rename from Dockerfile
rename to .devcontainer/Dockerfile
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 1bf8f2f..c24929b 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,6 +1,6 @@
 {
 	"name": "ZX Spectrum dev tools",
-	"image": "boarstone.mcphail.uk/mcphail/speccydev",
+	"build": { "dockerfile": "Dockerfile" },
 	"remoteUser": "ubuntu",
 	"runArgs": [
 		"--network=host"