added postinstall scripts

they will be versioned and accessed through a git web interface instead of a static website

postinstall/init.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=Postinstall Init
+
+[Service]
+ExecStart=/usr/bin/env bash /debian-postinstall-init.sh
+
+[Install]
+WantedBy=multi-user.target

postinstall/init.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+# Sometimes the network is slow, wait a bit
+sleep 10
+
+# Get the current DHCP network address (and gateway)
+NIC=$(ip link | grep "^2:" | awk '{print $2}' | tr -d ":")
+IP_ADDRESS=$(ip address show ${NIC} | grep -E "inet " | awk '{print $2}')
+NETMASK=$(echo ${IP_ADDRESS} | sed 's/.*\///')
+IP_ADDRESS=$(echo ${IP_ADDRESS} | sed 's/\/.*//')
+GATEWAY=$(ip route | grep "default" | awk '{print $3}')
+
+# Network interfaces (static address)
+cat << EOF > /etc/network/interfaces
+auto lo
+iface lo inet loopback
+
+auto ${NIC}
+iface ${NIC} inet static
+  address ${IP_ADDRESS}/${NETMASK}
+  gateway ${GATEWAY}
+EOF
+
+# Tabs instead of spaces, neat the file
+sed -i 's/  /\t/gm' /etc/network/interfaces
+
+# Hosts file
+cat << EOF > /etc/hosts
+127.0.0.1  localhost localhost.localdomain
+::1    localhost localhost.localdomain
+ff02::1    ip6-allnodes
+ff02::2    ip6-allrouters
+
+${IP_ADDRESS}  $(hostname --fqdn) $(hostname)
+EOF
+
+# Tabs instead of spaces, neat the file
+sed -i 's/  /\t/gm' /etc/hosts
+
+# Personalizations
+wget -O - https://45r.it/serversetup | bash
+
+# Cleanup and reboot
+rm -rf /etc/systemd/system/multi-user.target.wants/postinstall-init.service /var/lib/systemd/system/postinstall-init.service /debian-postinstall-init.sh /.wget-hsts
+reboot