diff --git a/README.md b/README.md
index 695bac6..d3b025c 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,31 @@
 
 Invite links for your [Gitea](https://gitea.io) instance!
 
+## Setup
+
+Configure Invitea with a config, environment variables, or flags.
+
+```yaml
+domain: http://localhost:8080
+session-secret: honk
+gitea-client-key: <client-key>       # OAuth2 app key
+gitea-client-secret: <client-secret> # OAuth2 app secret
+gitea-token: <admin token>           # Used for creating the accounts
+gitea-url: https://git.jojodev.com
+level: info
+```
+
+The CLI flags would match the key above and environment variables would match `INVITEA_<KEY>`.
+
+```sh
+./invitea --domain http://localhost8080 --session-secret honk
+```
+
+```sh
+INVITEA_DOMAIN="http://localhost:8080"
+INVITEA_SESSION_SECRET="honk"
+```
+
 ## License
 
 [MIT](LICENSE)
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