Allow setting SCIM_CONFIG via env var about docker-zulip

[sevmonster]

diff --git a/entrypoint.sh b/entrypoint.sh
index 11f0b00..18b5fd6 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -282,6 +282,7 @@ zulipConfiguration() {
            [ "$setting_key" = "SOCIAL_AUTH_SAML_ENABLED_IDPS" ] || \
            [ "$setting_key" = "SOCIAL_AUTH_SAML_ORG_INFO" ] || \
            { [ "$setting_key" = "LDAP_APPEND_DOMAIN" ] && [ "$setting_var" = "None" ]; } || \
+           [ "$setting_key" = "SCIM_CONFIG" ] || \
            [ "$setting_key" = "SECURE_PROXY_SSL_HEADER" ] || \
            [[ "$setting_key" = "CSRF_"* ]] || \
            [ "$setting_key" = "REALM_HOSTS" ] || \

I've had this in my local copy for a long time.