Welcome to this. Its a lot of fun.
You seem to be asking two different questions.
1. How to get the current helicorder page on your website.
2. How to get boom data on your website.
If you do a bit of a search, you can find the answer to 1.
From SSH;
sudo su
(Only sudo has privileges to write to the required directory).
crontab -e
(Vi editor, so hit :i to get into insert mode)
*/2 * * * * cp `ls /opt/data/gifs/R7EE4_SHZ_AM_00.2* -1t | head -1` /opt/data/gifs/latest.gif
(Swap out the R7EE etc for your station ID)
(To save and exit in Vi, hit :x enter)
exit
(To get out of sudo).
Now you find your latest helicorder display at the IPaddressofYourPi:5000/heli/latest.gif
That is a valid URL on the local LAN, so if your webserver is also on your lan, you can just link to that URL and the image will show up on the webpage.
(If not, you can set up an FTP or scp etc to copy it over the Internet).
As for your second question....
The boom is the same as the shake, so the same deal should work.
My boom has been down due to reasons, I plan to get it going again today.
Will check that the same process will work for it.
Cheers,
Ben.