Add .deb packaging, GitHub Actions CI/CD, and release workflows

- Makefile: add 'deb' and 'release' targets; fix migrate/create syntax
- scripts/build-deb.sh: build .deb with systemd unit, postinst/prerm/postrm
- .github/workflows/ci.yml: go build, test, lint on PR/push to main
- .github/workflows/release.yml: multi-platform build (linux/darwin/windows
  × amd64/arm64), .deb for Linux, tarballs, draft GitHub Release on tag v*
- README.md: add CI/Release badges, Install section with .deb and binary
  release instructions

README.md

@@ -1,5 +1,8 @@
 # LlamaLink
 
+[![CI](https://github.com/llamalink/llamalink/actions/workflows/ci.yml/badge.svg)](https://github.com/llamalink/llamalink/actions/workflows/ci)
+[![Release](https://img.shields.io/github/v/release/llamalink/llamalink?include_prereleases&label=latest)](https://github.com/llamalink/llamalink/releases/latest)
+
 **API Gateway en Go** para ejecutar modelos de lenguaje (LLMs) de forma local usando **llama.cpp**, con autenticación por API keys, rate limiting, cuotas de uso y panel de administración Vue 3.
 
 ## Características
@@ -105,6 +108,46 @@ docker compose -f deploy/docker-compose.yml up -d
 ADMIN_TOKEN=mi-token-secreto docker compose -f deploy/docker-compose.yml up -d
 ```
 
+## Install
+
+### Binary releases (all platforms)
+
+Download pre-built binaries from [GitHub Releases](https://github.com/llamalink/llamalink/releases):
+
+```bash
+# Linux/macOS/Windows — pick your arch
+curl -L https://github.com/llamalink/llamalink/releases/latest/download/llamalink-linux-amd64.tar.gz | tar -xz
+./llamalink
+```
+
+### .deb package (Debian/Ubuntu)
+
+```bash
+# Download latest .deb
+curl -L https://github.com/llamalink/llamalink/releases/latest/download/llamalink_VERSION_amd64.deb \
+  -o llamalink.deb
+
+# Install
+sudo dpkg -i llamalink.deb
+
+# Configure
+sudo nano /etc/llamalink/env
+sudo systemctl enable llamalink
+sudo systemctl start llamalink
+```
+
+### Build from source
+
+```bash
+git clone https://github.com/llamalink/llamalink.git
+cd llamalink
+make deps build
+
+# Or with .deb package
+make deb
+sudo dpkg -i dist/llamalink_*.deb
+```
+
 ## Admin Panel
 
 Accede a `http://localhost:8000/admin/` para el panel Vue 3:
@@ -139,14 +182,17 @@ Accede a `http://localhost:8000/admin/` para el panel Vue 3:
 ## Makefile
 
 ```bash
-make build       # Build binario
-make run         # Build y ejecutar
-make dev         # go run (desarrollo)
-make test        # Tests
-make lint        # golangci-lint
-make clean       # Limpiar build
-make migrate/up  # Correr migrations
+make build           # Build binario
+make run             # Build y ejecutar
+make dev             # go run (desarrollo)
+make test            # Tests
+make lint            # golangci-lint
+make clean           # Limpiar build
+make migrate/up      # Correr migrations
 make frontend/build  # Build Vue SPA
+make deb             # Build .deb package (Linux, requires dpkg-deb)
+make release         # Build .deb + local release artifacts
+make docker/build    # Build imagen Docker
 ```
 
 ## Arquitectura