Update README.md

Author: github-actions[bot]

README.md

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+# Secured Signal Api
+
+Secured Signal Api acts as a secured proxy for signal-rest-api.
+
+## Installation
+
+Get the latest version of the `docker-compose.yaml` file:
+
+```yaml
+---
+services:
+  myservice:
+    container_name: myservice
+```
+
+## Usage
+
+To send a message to `number`: `1234567`:
+
+```bash
+curl -X POST -H "Content-Type: application/json" -H "Authorization: Bearer TOKEN" -d '{"message": "Hello World!", "recipients": ["1234567"]}' http://signal-api/v2/send
+```
+
+## Contributing
+
+## License
+
+[MIT](https://choosealicense.com/licenses/mit/)