more readme

Dockerfile

 FROM debian:jessie
 
-#    Watchful NGinX container -- nginx docker container that watches for
+#    Watchful NginX container -- nginx docker container that watches for
 #    logrotated logfiles and makes sure nginx reloads them when needed.
 #    
 #    Copyright (C) 2015 Organized Crime and Corruption Reporting Project
@@ -39,7 +39,7 @@ RUN ln -sf /dev/stderr /var/log/nginx/error.log
 COPY run.sh /run.sh
 RUN chmod +x /run.sh
 
-VOLUME ["/var/cache/nginx"]
+VOLUME ["/var/cache/nginx", "/etc/nginx"]
 
 EXPOSE 80 443
 #CMD ["nginx", "-g", "daemon off;"]

README.md

-# watchful-nginx
+# Watchful NginX
+
+Watchful NginX container -- nginx docker container that watches for logrotated logfiles and makes sure nginx reloads them when needed.
+
+Upon start it creates a dhparam file in `/etc/ssl/nginx/dhparam.pem` (if the file does not exist) and sets an `inotify` watch on `/srv/logs/nginx/logrotate`. Once the watch discovers that the watchfile has been modified, it sends the `USR1` signal to `nginx`, which causes it to reload the logfiles.
+
+Use by volume-mounting the watchfile in this container and in a container that logrotate runs in, and making sure logrotate touches/modifies that file, for instance by using the following in your logrotate config files:
+
+```
+postrotate
+      /bin/date > /srv/logs/nginx/logrotate
+```
+
+## ToDo
+
+ - watch the logfiles themselves and remove the need for the explicit logrotate flag file
+ - more configuration options (logfile/watchfile locations, etc)

run.sh

 #!/bin/bash
 
-#    Watchful NGinX container -- nginx docker container that watches for
+#    Watchful NginX container -- nginx docker container that watches for
 #    logrotated logfiles and makes sure nginx reloads them when needed.
 #    
 #    Copyright (C) 2015 Organized Crime and Corruption Reporting Project