Add basic codespaces configuration (#1646)

Author: Manishearth

.devcontainer/Dockerfile

@@ -0,0 +1,12 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.222.0/containers/rust/.devcontainer/base.Dockerfile
+
+# [Choice] Debian OS version (use bullseye on local arm64/Apple Silicon): buster, bullseye
+ARG VARIANT="buster"
+FROM mcr.microsoft.com/vscode/devcontainers/rust:0-${VARIANT}
+
+# [Optional] Uncomment this section to install additional packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+USER vscode
+RUN cargo install cargo-make

.devcontainer/devcontainer.json

@@ -0,0 +1,46 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.222.0/containers/rust
+{
+	"name": "Rust",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			// Use the VARIANT arg to pick a Debian OS version: buster, bullseye
+			// Use bullseye when on local on arm64/Apple Silicon.
+			"VARIANT": "buster"
+		}
+	},
+	"runArgs": [
+		"--cap-add=SYS_PTRACE",
+		"--security-opt",
+		"seccomp=unconfined"
+	],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"lldb.executable": "/usr/bin/lldb",
+		// VS Code don't watch files under ./target
+		"files.watcherExclude": {
+			"**/target/**": true
+		},
+		"rust-analyzer.checkOnSave.command": "clippy"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"vadimcn.vscode-lldb",
+		"mutantdino.resourcemonitor",
+		"matklad.rust-analyzer",
+		"tamasfe.even-better-toml",
+		"serayuzgur.crates"
+	],
+
+	// 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",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode"
+}

.gitignore

@@ -35,3 +35,5 @@ tools/datagen/tests/testdata/work_log_bincode
 # Other blanket directory ignores
 **/node_modules/
 **/_debug/
+
+.venv