Create devcontainer.json

Copied from https://github.com/devcontainers/images/blob/main/src/rust/.devcontainer/devcontainer.json

.devcontainer/devcontainer.json

@@ -0,0 +1,29 @@
+{
+    "build": {
+        "dockerfile": "./Dockerfile",
+        "context": "."
+    },
+    "features": {
+        "ghcr.io/devcontainers/features/common-utils:2": {
+            "installZsh": "true",
+            "username": "vscode",
+            "userUid": "1000",
+            "userGid": "1000",
+            "upgradePackages": "true"
+        },
+        "ghcr.io/devcontainers/features/rust:1": "latest",
+		"ghcr.io/devcontainers/features/git:1": {
+            "version": "latest",
+            "ppa": "false"
+        }
+    },
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "rustc --version",
+
+	// Set `remoteUser` to `root` to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode"
+}