update base image; add compose file

README.md

@@ -2,6 +2,11 @@
 
 This is a micro-service image for VSFTPD.
 
+It is a fork from [panubo's docker-vsftpd](https://github.com/panubo/docker-vsftpd) (thanks!) and slightly modified to suit my needs:
+* Update base image to `debian:latest`
+* Support for configurable min and max port in passive mode
+  by templating the config files (via envsubst)
+
 There are a few limitations but it will work if you are using host networking
 `--net host` or have a direct/routed network between the Docker container and
 the client.
@@ -33,6 +38,10 @@ which is in the _whois_ debian package.
 - `FTP_PASV_ADDRESS`: override the IP address that vsftpd will advertise in
   response to the PASV command
 
+- `FTP_PASV_MIN_PORT`: Minimum port for passive mode (remember to bind the ports if not used with compose file)
+
+- `FTP_PASV_MAX_PORT`: Maximum port for passive mode (remember to bind the ports if not used with compose file)
+
 ## Usage Example
 
 ```