diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..d69264d
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,37 @@
+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.101.0/containers/docker-existing-dockerfile
+{
+	"name": "Existing Dockerfile",
+
+	// Sets the run context to one level up instead of the .devcontainer folder.
+	"context": "..",
+
+	// Update the 'dockerFile' property if you aren't using the standard 'Dockerfile' filename.
+	"dockerFile": "../Dockerfile",
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": null
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"kalitaalexey.vscode-rust",
+		"rust-lang.rust"
+	]
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Uncomment the next line to run commands after the container is created - for example installing git.
+	// "postCreateCommand": "apt-get update && apt-get install -y git",
+
+	// Uncomment when using a ptrace-based debugger like C++, Go, and Rust
+	// "runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
+
+	// Uncomment to use the Docker CLI from inside the container. See https://aka.ms/vscode-remote/samples/docker-in-docker.
+	// "mounts": [ "source=/var/run/docker.sock,target=/var/run/docker.sock,type=bind" ],
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..72cec52
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/.env
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..79ee39d
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,95 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "c2-chacha"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "getrandom"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "hello"
+version = "0.1.0"
+dependencies = [
+ "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "ppv-lite86"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rand"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "c2-chacha 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum c2-chacha 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
+"checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
+"checksum libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)" = "d515b1f41455adea1313a4a2ac8a8a477634fbae63cc6100e3aebb207ce61558"
+"checksum ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
+"checksum rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
+"checksum rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "03a2a90da8c7523f554344f921aa97283eadf6ac484a6d2a7d0212fa7f8d6853"
+"checksum rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+"checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
+"checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..997a555
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "hello"
+version = "0.1.0"
+authors = ["tamakiii"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.7.3"
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..44e487a
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,33 @@
+FROM rust:1.41.0-alpine3.11 AS production-pseudo
+
+RUN apk add --no-cache make bash && \
+    sed -i -e 's|/bin/ash|/bin/bash|' /etc/passwd
+
+# --
+
+FROM production-pseudo AS development
+
+ENV PAGER=less
+ENV RUSTFLAGS -C target-feature=-crt-static
+
+RUN apk add --no-cache \
+      git \
+      bash-doc \
+      bash-completion \
+      openssl-dev \
+      man \
+      man-pages \
+      coreutils-doc \
+      cargo-doc \
+      rust-doc \
+      && \
+    rustup component add rustfmt
+
+RUN mkdir -p ~/.local/share/bash-completion/completions && \
+    rustup completions bash >> ~/.local/share/bash-completion/completions/rustup && \
+    rustup toolchain add nightly && \
+    rustup component add rust-analysis && \
+    rustup component add rust-src && \
+    rustup component add rls
+
+RUN cargo install cargo-edit
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..bd077a0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,20 @@
+.PHONY: install run fmt clean
+
+install:
+	cargo install --path .
+
+build:
+	cargo $@
+
+run:
+	cargo $@
+
+check:
+	cargo $@
+
+fmt:
+	cargo $@
+
+clean:
+	cargo $@
+
diff --git a/docker.mk b/docker.mk
new file mode 100644
index 0000000..5de8997
--- /dev/null
+++ b/docker.mk
@@ -0,0 +1,38 @@
+.PHONY: init build ash bash run run/% make/% clean
+
+NAME := tamakiii-sandbox/hello-rust
+WORK := /app
+ENVIRONMENT := $(shell grep '^ENVIRONMENT=' .env | sed -E 's/ENVIRONMENT=//')
+CMD := bash
+VSC_NAME := vsc-hello-rust-
+
+init: \
+	.env \
+	build
+
+.env:
+	touch $@
+	echo "ENVIRONMENT=production-pseudo" >> $@
+
+build:
+	docker build -t $(NAME) --target $(ENVIRONMENT) .
+
+run:
+	docker run --rm -it -v $(PWD):$(WORK) -w $(WORK) $(NAME) make run
+
+ash: run/ash
+bash: run/bash
+
+run/%:
+	docker run --rm -it -v $(PWD):$(WORK) -w $(WORK) $(NAME) $(@F)
+
+make/%:
+	docker run --rm -it -v $(PWD):$(WORK) -w $(WORK) $(NAME) make $(@F)
+
+vsc:
+	docker exec -it $$(docker container ls | grep $(VSC_NAME) | awk '{ print $$1 }') $(CMD)
+
+clean:
+	rm .env
+	docker image rm $(NAME)
+
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..f2b137c
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,17 @@
+use std::io;
+use rand::Rng;
+
+fn main() {
+    println!("Guess the number");
+    println!("Please input your gess.");
+
+    let mut guess = String::new();
+
+    io::stdin().read_line(&mut guess)
+        .expect("failed to read line!!");
+
+    let secret_number = rand::thread_rng().gen_range(1, 101);
+
+    println!("You guessed: {}", guess);
+    println!("The secret number is: {}", secret_number);
+}