add config for cargo-deb

debian/postinst

@@ -0,0 +1,42 @@
+#!/bin/sh
+set -e
+
+case "$1" in
+    configure)
+        if ! getent group | grep -q "^www-data:"; then
+            echo -n "Adding group www-data.."
+            addgroup --quiet --system www-data 2>/dev/null || true
+            echo ".done"
+        fi
+        test -d /var/www || mkdir /var/www
+        if ! getent passwd | grep -q "^www-data:"; then
+            echo -n "Adding system user www-data.."
+            adduser --quiet --system --ingroup www-data --no-create-home --disabled-password www-data 2>/dev/null || true
+            echo ".done"
+        fi
+        usermod -c www-data -d /var/www -g www-data www-data
+        if ! test -d /var/lib/subscribe-list/; then
+            mkdir -m 750 /var/lib/subscribe-list/
+            touch /var/lib/subscribe-list/list.db
+            chmod 640 /var/lib/subscribe-list/list.db
+            chown -R www-data:www-data /var/lib/subscribe-list/
+        fi
+        if ! test -d /etc/subscribe-list/; then
+            mkdir -m 750 /etc/subscribe-list/
+            install -m 640 /usr/share/subscribe-list/config.toml.sample /etc/subscribe-list/config.toml
+            chown -R root:www-data /etc/subscribe-list/
+        fi
+        ;;
+
+    abort-upgrade|abort-remove|abort-deconfigure)
+        ;;
+
+    *)
+        echo "postinst called with unknown argument \`$1'" >&2
+        exit 1
+        ;;
+esac
+
+#DEBHELPER#
+
+exit 0