Update README

Author: ernsheong

README.md

@@ -1 +1,19 @@
-Docker configuration for Keycloak + Nginx + Postgres
+# keycloak-postgres-nginx
+
+Docker configuration for Keycloak + Nginx + Postgres with Let's Encrypt support.
+
+Easily setup a standalone node for [Keycloak](http://www.keycloak.org) server so you can worry less about authentication and worry more about your application features.
+
+## Usage
+
+1. Modify the variables in the `.env` file.
+
+1. For `LE_OPTIONS`, choose either `--staging` or `--keep-until-expiring`, not both. (TODO: debug options failure)
+
+1. For dev purposes: `docker-compose -f docker-compose-self-signed.yml up`
+
+1. For production: `docker-compose -f docker-compose-lets-encrypt.yml up`
+
+## License
+
+MIT License.