Update documentation

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

compose.prod.yaml

@@ -9,7 +9,7 @@ services:
       TRUST_AUTH_TOKEN_SECRET: "this-is-a-secure-secret-for-trust-token-signing-at-least-32-bytes"
 
       # Application settings
-      PROBOD_HOSTNAME: "localhost:8080"
+      PROBOD_BASE_URL: "http://localhost:8080"
       API_ADDR: "localhost:8080"
       API_CORS_ALLOWED_ORIGINS: "http://localhost:8080"