add: install.sh

Author: dev-satoshi

README.md

@@ -1 +1,6 @@
-# dotfiles
+# dotfiles
+
+## Installation
+```
+$ curl -sL https://github.com/dev-satoshi/dotfiles/install.sh | sh
+```

install.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+set -euo pipefail
+
+INSTALL_DIR="$HOME/dotfiles"
+
+if [ -d "$INSTALL_DIR" ]; then
+  echo "Updating dotfiles..."
+  git -C "$INSTALL_DIR" pull
+else
+  echo "Installing dotfiles..."
+  git clone https://github.com/dev-satoshi/dotfiles "$INSTALL_DIR"
+fi
+
+sh "$INSTALL_DIR/scripts/setup.sh"