feat: add one-liner install script for Linux/macOS

Downloads the latest release binary for the detected OS/arch and
installs to ~/.local/bin. Updated README with install instructions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: paoloanzn

README.md

@@ -57,13 +57,20 @@ flare serve docker:container --image nginx:alpine --container-port 80 --subdomai
 
 ## Install
 
-### From source
+**One-liner (Linux / macOS):**
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/Gladium-AI/flare-cli/main/install.sh | sh
+```
+
+Downloads the latest release for your OS/arch and installs to `~/.local/bin`.
+
+**Build from source:**
 
 ```bash
 git clone https://github.com/Gladium-AI/flare-cli.git
 cd flare-cli
-make build
-sudo mv flare /usr/local/bin/
+make install   # installs to ~/.local/bin
 ```
 
 ### Prerequisites

install.sh

@@ -0,0 +1,74 @@
+#!/bin/sh
+set -e
+
+REPO="Gladium-AI/flare-cli"
+INSTALL_DIR="${INSTALL_DIR:-$HOME/.local/bin}"
+BINARY="flare"
+
+# Detect OS.
+OS="$(uname -s)"
+case "$OS" in
+  Linux*)  GOOS="linux" ;;
+  Darwin*) GOOS="darwin" ;;
+  *)       echo "Unsupported OS: $OS" >&2; exit 1 ;;
+esac
+
+# Detect architecture.
+ARCH="$(uname -m)"
+case "$ARCH" in
+  x86_64|amd64)  GOARCH="amd64" ;;
+  arm64|aarch64)  GOARCH="arm64" ;;
+  *)              echo "Unsupported architecture: $ARCH" >&2; exit 1 ;;
+esac
+
+echo "Detected platform: ${GOOS}/${GOARCH}"
+
+# Get the latest release tag.
+if command -v curl >/dev/null 2>&1; then
+  TAG="$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | head -1 | sed 's/.*"tag_name": *"//;s/".*//')"
+elif command -v wget >/dev/null 2>&1; then
+  TAG="$(wget -qO- "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | head -1 | sed 's/.*"tag_name": *"//;s/".*//')"
+else
+  echo "Error: curl or wget is required" >&2
+  exit 1
+fi
+
+if [ -z "$TAG" ]; then
+  echo "Error: could not determine latest release" >&2
+  exit 1
+fi
+
+echo "Latest release: ${TAG}"
+
+ARCHIVE="${BINARY}-${TAG}-${GOOS}-${GOARCH}.tar.gz"
+URL="https://github.com/${REPO}/releases/download/${TAG}/${ARCHIVE}"
+
+# Download and extract.
+TMPDIR="$(mktemp -d)"
+trap 'rm -rf "$TMPDIR"' EXIT
+
+echo "Downloading ${URL}..."
+if command -v curl >/dev/null 2>&1; then
+  curl -fsSL "$URL" -o "${TMPDIR}/${ARCHIVE}"
+else
+  wget -q "$URL" -O "${TMPDIR}/${ARCHIVE}"
+fi
+
+tar -xzf "${TMPDIR}/${ARCHIVE}" -C "$TMPDIR"
+
+# Install.
+mkdir -p "$INSTALL_DIR"
+mv "${TMPDIR}/${BINARY}" "${INSTALL_DIR}/${BINARY}"
+chmod +x "${INSTALL_DIR}/${BINARY}"
+
+echo "Installed ${BINARY} ${TAG} to ${INSTALL_DIR}/${BINARY}"
+
+# Check if INSTALL_DIR is in PATH.
+case ":$PATH:" in
+  *":${INSTALL_DIR}:"*) ;;
+  *)
+    echo ""
+    echo "Add ${INSTALL_DIR} to your PATH:"
+    echo "  export PATH=\"${INSTALL_DIR}:\$PATH\""
+    ;;
+esac