📝(self-hosted) add documentation for self-hosting on docker compose

It describes the minimalist LaSuite Meet instance, with the simple
feature of having a room conference.

docs/examples/compose/nginx-proxy/README.md

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+# Nginx proxy with automatic SSL certificates
+
+> [!CAUTION]
+> We provide those instructions as an example, for extended development or production environments, you should follow the [official documentation](https://github.com/nginx-proxy/acme-companion/tree/main/docs).
+
+Nginx-proxy sets up a container running nginx and docker-gen. docker-gen generates reverse proxy configs for nginx and reloads nginx when containers are started and stopped.
+
+Acme-companion is a lightweight companion container for nginx-proxy. It handles the automated creation, renewal and use of SSL certificates for proxied Docker containers through the ACME protocol.
+
+## Installation
+
+### Step 1: Prepare your working environment:
+
+```bash
+mkdir nginx-proxy && cd nginx-proxy
+curl -o compose.yaml https://raw.githubusercontent.com/suitenumerique/meet/refs/heads/main/docs/examples/compose/nginx-proxy/compose.yaml
+```
+
+### Step 2: Edit `DEFAULT_EMAIL` in the compose file.
+
+Albeit optional, it is recommended to provide a valid default email address through the `DEFAULT_EMAIL` environment variable, so that Let's Encrypt can warn you about expiring certificates and allow you to recover your account.
+
+### Step 3: Create docker network
+
+Containers need share the same network for auto-discovery.
+
+```bash
+docker network create proxy-tier
+```
+
+### Step 4: Start service
+
+```bash
+docker compose up -d
+```
+
+## Usage
+
+Once both nginx-proxy and acme-companion containers are up and running, start any container you want proxied with environment variables `VIRTUAL_HOST` and `LETSENCRYPT_HOST` both set to the domain(s) your proxied container is going to use.

docs/examples/compose/nginx-proxy/compose.yaml

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+services:
+  nginx-proxy:
+    image: nginxproxy/nginx-proxy
+    container_name: nginx-proxy
+    ports:
+    - "80:80"
+    - "443:443"
+    volumes:
+    - html:/usr/share/nginx/html
+    - certs:/etc/nginx/certs:ro
+    - /var/run/docker.sock:/tmp/docker.sock:ro
+    networks:
+    - proxy-tier
+
+  acme-companion:
+    image: nginxproxy/acme-companion
+    container_name: nginx-proxy-acme
+    environment:
+    - DEFAULT_EMAIL=mail@yourdomain.tld
+    volumes_from:
+    - nginx-proxy
+    volumes:
+    - certs:/etc/nginx/certs:rw
+    - acme:/etc/acme.sh
+    - /var/run/docker.sock:/var/run/docker.sock:ro
+    networks:
+    - proxy-tier
+
+networks:
+  proxy-tier:
+    external: true
+
+volumes:
+  html:
+  certs:
+  acme: