Merge pull request #5 from jeffersongoncalves/mailu-update

docs(mailu): add README and .gitignore for configuration guidance

Author: wallacemartinss

Applications/mailu/.env Applications/mailu/.env.exampleApplications/mailu/.env renamed to Applications/mailu/.env.example

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+.env

Applications/mailu/.gitignore

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+# MAILU
+
+Documentação do Mailu
+
+[https://mailu.io/](https://mailu.io/)
+
+## Usage
+
+Ajustar o endpoint do traefik no arquivo docker-compose.yml
+
+```yaml
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.mail.rule=Host(`mail.seudominio.com`)"
+      - "traefik.http.routers.mail.entrypoints=websecure"
+      - "traefik.http.services.mail.loadbalancer.server.port=80"
+      - "traefik.docker.network=production"
+```
+
+Crie o arquivo .env.
+
+```bash
+cp .env.example .env
+```
+
+```dotenv
+# Basic configuration
+MAILU_VERSION=1.9
+ROOT=/
+DOMAIN=seudominio.com
+HOSTNAMES=mail.seudominio.com
+TLS_FLAVOR=letsencrypt
+
+# Authentication
+AUTH_RATELIMIT=10/minute
+ADMIN=admin
+PASSWORD=senha_segura
+
+# Network
+WEBMAIL=roundcube
+REDIS_HOST=redis
+REDIS_PASSWORD=suaSenhaSeguraAqui
+ANTISPAM=none
+
+# Traefik? Use isso para não expor 80/443 diretamente
+# Uncomment if using traefik
+# FORWARDED_ALLOW_IPS=*
+
+# Optional DKIM
+DKIM_SELECTOR=mail
+```
+
+## Comands
+
+```bash
+docker compose build
+```
+
+```bash
+docker compose up -d
+```
+
+```bash
+docker compose down
+```
+
+```bash
+docker compose rm
+```