Add minimal Debian packaging

debian/changelog

+crawl (0.1) unstable; urgency=low
+
+  * First packaged release.
+
+ -- ale <ale@incal.net>  Sat, 22 Aug 2020 17:21:02 +0100

debian/compat

+13

debian/control

+Source: crawl
+Section: net
+Priority: extra
+Maintainer: ale <ale@incal.net>
+Build-Depends: debhelper (>= 11), dh-golang, golang-any (>= 1.11)
+Standards-Version: 4.1.3
+XS-Go-Import-Path: git.autistici.org/ale/crawl
+
+Package: crawl
+Architecture: any
+Built-Using: ${misc:Built-Using}
+Depends: ${shlib:Depends}, ${misc:Depends}
+Description: Simple website crawler
+ Simple website crawler that generates WARC files.

debian/rules

+#!/usr/bin/make -f
+# -*- makefile -*-
+
+export DH_GOPKG = git.autistici.org/ale/crawl
+export DH_GOLANG_EXCLUDES = vendor
+
+%:
+	dh $@ --with=golang --buildsystem=golang
+
+override_dh_auto_install:
+	dh_auto_install -- --no-source
+
+