Add .deb bundling automation

alumnihub_10.0_amd64/DEBIAN/control

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+Package: alumnihub
+Version: 10.0-1
+Architecture: amd64
+Essential: no
+Priority: optional
+Depends: aspnetcore-runtime-10.0,nginx,postgresql-18
+Maintainer: kocoder
+Description: Our production oqtane setup

alumnihub_10.0_amd64/DEBIAN/postinst

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+#!/bin/bash

alumnihub_10.0_amd64/DEBIAN/postrm

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+#!/bin/bash
+deluser oqtane

alumnihub_10.0_amd64/DEBIAN/preinst

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+#!/bin/bash
+useradd oqtane

alumnihub_10.0_amd64/etc/systemd/system/alumnihub.service

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+[Unit]
+Description=Alumnihub Webservice
+
+[Service]
+WorkingDirectory=/opt/oqtane
+ExecStart=/usr/bin/dotnet /opt/oqtane/Oqtane.Server.dll
+Restart=always
+# Restart service after 10 seconds if the dotnet service crashes:
+RestartSec=5
+KillSignal=SIGINT
+SyslogIdentifier=alumnihub
+User=oqtane
+Environment=ASPNETCORE_ENVIRONMENT=Production
+Environment=ASPNETCORE_URLS="http://127.0.0.1:5000"
+Environment=ASPNETCORE_FORWARDEDHEADERS_ENABLED=true
+Environment=ASPNETCORE_FORWARDEDHEADERS_PROXIES=127.0.0.1
+Environment=DOTNET_NOLOGO=true
+
+[Install]
+WantedBy=multi-user.target