Tighten context during build of nginx and simpleid
diff --git a/simpleid/Dockerfile b/simpleid/Dockerfile
index 8c56da1..f4ad457 100644
--- a/simpleid/Dockerfile
+++ b/simpleid/Dockerfile
@@ -11,7 +11,7 @@
 
 RUN mv "${PHP_INI_DIR}/php.ini-production" "${PHP_INI_DIR}/php.ini"
 
-COPY simpleid/Dockerfile.entrypoint /simpleid-entrypoint
+COPY Dockerfile.entrypoint /simpleid-entrypoint
 RUN chmod 544 /simpleid-entrypoint
 
 ENTRYPOINT ["/bin/sh", "/simpleid-entrypoint"]