Add Dockerfile and build script; update .gitignore and installation paths

.gitignore

@@ -1 +1,2 @@
 *.deb
+out

Dockerfile

@@ -0,0 +1,16 @@
+ARG UBUNTU_VERSION=24.04
+FROM ubuntu:${UBUNTU_VERSION}
+
+RUN apt-get update \
+ && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        build-essential \
+        dpkg-dev \
+        debhelper \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /build
+COPY . src/
+RUN cd src && dpkg-buildpackage -us -uc -b \
+ && mkdir /out \
+ && find /build -maxdepth 1 \( -name '*.deb' -o -name '*.buildinfo' -o -name '*.changes' \) \
+        -exec mv {} /out/ \;

build.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+mkdir -p out
+
+container build -t cloud-router-builder "$@" .
+
+echo "Build artifacts written to out/"

debian/control

@@ -2,7 +2,7 @@ Source: cloud-router
 Section: net
 Priority: optional
 Maintainer: Sławomir Koszewski <slawek@koszewscy.waw.pl>
-Build-Depends: debhelper-compat (= 14)
+Build-Depends: debhelper-compat (= 13)
 Standards-Version: 4.6.2
 Rules-Requires-Root: no
 

debian/install

@@ -1,4 +1,4 @@
 src/etc/sysctl.d/99-cloud-router.conf             etc/sysctl.d/
-src/usr/local/sbin/simple-ca                      usr/local/sbin/
+src/opt/cloud-router/bin/simple-ca                opt/cloud-router/bin/
 src/usr/lib/cloud-router/configure                usr/lib/cloud-router/
 src/usr/share/cloud-router/templates/*            usr/share/cloud-router/templates/