docs: Link INSTALL.md in README and add bash installer

- Update README.md with INSTALL.md link
- Add one-line curl|bash installer to README and INSTALL.md
- Update install.sh URL to use dev-mvp branch (current)
- Fix build command path in README
- Add note about future main branch migration

Author: thanhdevapp

.gitignore

@@ -68,8 +68,10 @@ test-ck
 __pycache__
 prompt.md
 
-# Go binary
-dev-cleaner
+# Go binary (CLI build output)
+/dev-cleaner
+dev-cleaner-test
+dev-cleaner-v*
 
 # Gemini CLI settings (symlink to .claude/.mcp.json)
 .gemini/settings.json

INSTALL.md

@@ -25,6 +25,30 @@ brew update
 brew upgrade dev-cleaner
 ```
 
+### One-Line Installer (macOS & Linux)
+
+**Automatic installation:**
+```bash
+curl -fsSL https://raw.githubusercontent.com/thanhdevapp/mac-dev-cleaner-cli/dev-mvp/install.sh | bash
+```
+
+**What it does:**
+- Detects your OS and architecture automatically
+- Downloads the latest release binary
+- Installs to `/usr/local/bin/`
+- Verifies installation
+
+**Manual review before running:**
+```bash
+# View the script first
+curl -fsSL https://raw.githubusercontent.com/thanhdevapp/mac-dev-cleaner-cli/dev-mvp/install.sh
+
+# Then run it
+curl -fsSL https://raw.githubusercontent.com/thanhdevapp/mac-dev-cleaner-cli/dev-mvp/install.sh | bash
+```
+
+> **Note:** After migrating to `main` branch (see BRANCHING_STRATEGY.md), URLs will use `/main/` instead of `/dev-mvp/`
+
 ---
 
 ## Download Binaries

README.md

@@ -22,19 +22,33 @@ Mac Dev Cleaner is a CLI tool that helps developers reclaim disk space by removi
 
 ## Installation
 
-### Homebrew (Coming Soon)
+### Quick Install (Recommended)
 
+**Homebrew:**
 ```bash
 brew tap thanhdevapp/tools
 brew install dev-cleaner
 ```
 
-### From Source
+**One-line installer:**
+```bash
+curl -fsSL https://raw.githubusercontent.com/thanhdevapp/mac-dev-cleaner-cli/dev-mvp/install.sh | bash
+```
+
+### More Options
+
+See [INSTALL.md](INSTALL.md) for:
+- Direct binary downloads (macOS ARM/Intel, Linux)
+- Build from source instructions
+- GUI installation
+- Troubleshooting
+
+### Quick Build from Source
 
 ```bash
-git clone https://github.com/thanhdevapp/dev-cleaner.git
-cd dev-cleaner
-go build -o dev-cleaner .
+git clone https://github.com/thanhdevapp/mac-dev-cleaner-cli.git
+cd mac-dev-cleaner-cli
+go build -o dev-cleaner ./cmd/dev-cleaner
 sudo mv dev-cleaner /usr/local/bin/
 ```