add flake

.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+	"name": "Alpine",
+	"image": "mcr.microsoft.com/devcontainers/base:alpine-3.20",
+	"postCreateCommand": "sudo apk add nix nix-dev nix-doc nix-manual nix-bash-completion && sudo chown -R vscode:vscode /nix && mkdir -p ~/.config/nix && echo 'experimental-features = nix-command flakes\n sandbox = false' > ~/.config/nix/nix.conf",
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"bbenoist.Nix"
+			]
+		}
+	},
+	"runArgs": [
+		"--userns=keep-id"
+	],
+	"containerUser": "vscode"
+}