fix(self-hosted): add jwt issuer env var to auth config (#46020)

docker/docker-compose.yml

@@ -165,6 +165,8 @@ services:
       # For Podman, use: GOTRUE_JWT_KEYS: ${JWT_KEYS}
       #GOTRUE_JWT_KEYS: ${JWT_KEYS:-[]}
 
+      GOTRUE_JWT_ISSUER: ${API_EXTERNAL_URL}/auth/v1
+
       GOTRUE_EXTERNAL_EMAIL_ENABLED: ${ENABLE_EMAIL_SIGNUP}
       GOTRUE_EXTERNAL_ANONYMOUS_USERS_ENABLED: ${ENABLE_ANONYMOUS_USERS}
       GOTRUE_MAILER_AUTOCONFIRM: ${ENABLE_EMAIL_AUTOCONFIRM}