add debian building. add asset compile and embedding. other fixes.

debian/ROOT/DEBIAN/postrm

@@ -0,0 +1,20 @@
+#!/bin/sh
+set -e
+
+case "$1" in
+    remove)
+        if systemctl is-active sour.is-paste.service; then
+                systemctl stop sour.is-paste.service
+        fi
+    ;;
+
+    purge)
+        if systemctl is-enabled sour.is-paste.service; then
+                systemctl disable sour.is-paste.service
+        fi
+    ;;
+esac
+
+exit 0
+
+