revert 50bb474 #857

.devcontainer/Dockerfile

@@ -0,0 +1,3 @@
+ARG VARIANT="buster"
+FROM mcr.microsoft.com/devcontainers/rust:1-${VARIANT}
+RUN sudo apt update && sudo apt install -y cmake

.devcontainer/devcontainer.json

@@ -1,7 +1,9 @@
 {
-	"name": "Rust",
-	"image": "mcr.microsoft.com/devcontainers/rust:1-buster",
-	"extensions": [
-		"EditorConfig.EditorConfig"
-	]
+  "name": "Rust",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "args": { "VARIANT": "buster" }
+  },
+  "extensions": ["EditorConfig.EditorConfig"],
+  "remoteUser": "vscode"
 }