Improved documentation

Author: agnetemoos

.env.docker.example

@@ -1,3 +1,12 @@
+# =============================================================================
+#  Example .env file for os2display-docker-server
+#  It contains variables for local configuration. 
+#  Copy this file to .env.docker and adjust the values as needed for your setup.
+#  Lines starting with # are comments.
+# =============================================================================
+
+
+# The domain name where the server will be accessible (e.g., demo.os2display.dk)
 COMPOSE_SERVER_DOMAIN=demo.os2display.dk
 
 # Version of itkdev/os2display-api-service