diff --git a/docker/.env-sample b/docker/.env-sample
index f35e397..5574e0d 100644
--- a/docker/.env-sample
+++ b/docker/.env-sample
@@ -1,3 +1,13 @@
+# ============================================================
+# This file is common for Docker or nor Docker install types.
+# ------------------------------------------------------------
+# 1) Please copy this file into the same directory as .env
+# 2) The file .env can/must be modified before:
+#  * The install of PyROS if you want to use without Docker.
+#  * The PYROS_DOCKER_BUILD of PyROS with Docker.
+# ============================================================
+
+# === MySQL variables (change them only if you do not use Docker)
 # any value as password without any space
 MYSQL_ROOT_PASSWORD=root
 # define the name of the root account (when not using Docker)
--
libgit2 0.21.2