Update README.md

README.md

@@ -51,8 +51,8 @@ available:
 Note that the defaults are the same as Tor's default if the
 configuration option is not set.
 
-You can use the `-m` option of Docker to mount a custom template the
-inmage at `/etc/tor/torrc.template`. The templating engine
+You can use the `-m` option of Docker to mount a custom template in the
+image at `/etc/tor/torrc.template`. The templating engine
 (`envsubst`) will only replace specific environment variables in the
 template. These are controlled by the environment variable
 `SHELL_FORMAT` (the default list is
@@ -64,7 +64,10 @@ environment variable `SHELL_FORMAT_EXTRA`. Be careful to escape the
 `$` characters since you don't want them to be interpolated when
 defining `SHELL_FORMAT` or `SHELL_FORMAT_EXTRA`.
 
-Of course you can also build an image on top of this one with a custom `torrc.template`.
+The out-of-the-box torrc.template also loads any file in the
+`/etc/tor/torrc.d/` directory with the `.conf` extension so you can
+mount your custom torrc configuration file(s) there. This is similar
+to the `TORRC_APPEND` environment variable but using files instead.
 
 For troubleshooting, you can enable verbose logging by setting the
 value of environment variable `DEBUG` to `true`.