Render the lsb_release at flask init time

Don't change the index.html file at setup time

management/daemon.py

@@ -101,9 +101,12 @@ def index():
 	utils.fix_boto() # must call prior to importing boto
 	import boto.s3
 	backup_s3_hosts = [(r.name, r.endpoint) for r in boto.s3.regions()]
+	lsb=utils.shell("check_output", ["/usr/bin/lsb_release", "-d"])
 
 	return render_template('index.html',
 		hostname=env['PRIMARY_HOSTNAME'],
+		distname=lsb[lsb.find("\t")+1:-1],
+		
 		storage_root=env['STORAGE_ROOT'],
 
 		no_users_exist=no_users_exist,

management/templates/index.html

@@ -180,7 +180,7 @@
 		<hr>
 
 		<footer>
-			<p>This is a <a href="https://github.com/ddavness/power-mailinabox">Power Mail-in-a-Box</a>, using !!___DIST_TAG___!!
+			<p>This is a <a href="https://github.com/ddavness/power-mailinabox">Power Mail-in-a-Box</a> - {{distname}}
 			</p>
 		</footer>
 	</div> <!-- /container -->

setup/preflight.sh

@@ -18,8 +18,6 @@ if [ "$OS" != "Debian GNU/Linux 10 (buster)" -a "$OS" != "Ubuntu 20.04 LTS" ]; t
 	exit 1
 fi
 
-sed -i "s|!!___DIST_TAG___!!|${OS}|g" management/templates/index.html
-
 # Check that we have enough memory.
 #
 # /proc/meminfo reports free memory in kibibytes. Our baseline will be 512 MB,