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>>> docker exec -it CONTAINERID /bin/sh
/app # telnet
/bin/sh: telnet: not found

/app # apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
v3.7.0-243-gf26e75a186 [http://dl-cdn.alpinelinux.org/alpine/v3.7/main]
v3.7.0-229-g087f28e29d [http://dl-cdn.alpinelinux.org/alpine/v3.7/community]

1. Download Xcode from https://developer.apple.com/download/more/ (this requeires to Login in with an Apple Developer Account)

At the moment id don´t know how to authenticate so i have no clue to download the xip via curl/wget.
In my case i downloaded the file and copied it via scp to my mac.

eg. for Xcode 9.2 https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_9.2/Xcode_9.2.xip

2. Verify Signature of xip file

pkgutil --verbose --check-signature path/to/xip

	deb https://ftp.debian.org/debian/ bookworm contrib main non-free non-free-firmware
	# deb-src https://ftp.debian.org/debian/ bookworm contrib main non-free non-free-firmware

	deb https://ftp.debian.org/debian/ bookworm-updates contrib main non-free non-free-firmware
	# deb-src https://ftp.debian.org/debian/ bookworm-updates contrib main non-free non-free-firmware

	deb https://ftp.debian.org/debian/ bookworm-proposed-updates contrib main non-free non-free-firmware
	# deb-src https://ftp.debian.org/debian/ bookworm-proposed-updates contrib main non-free non-free-firmware

	deb https://ftp.debian.org/debian/ bookworm-backports contrib main non-free non-free-firmware

	- interface: {{ 'bond0' if hostvars[item].bond_interfaces \| length > 0 else 'eth0' }}
	dhcp: false
	addresses:
	- {{ hostvars[item].ip }}
	routes:
	- network: 0.0.0.0/0
	gateway: {{ hostvars[item].ip \| ipaddr('1') \| ipaddr('address') }}
	{% if hostvars[item].bond_interfaces \| length > 0 %}
	bond:
	interfaces: {{ hostvars[item].bond_interfaces }}

	#!/bin/bash

	set -e

	# OPTIONAL: zsh will not install without ncurses. IF your machine doesn't have ncurses, you need to install it first.
	export CXXFLAGS=" -fPIC" CFLAGS=" -fPIC" CPPFLAGS="-I${HOME}/include" LDFLAGS="-L${HOME}/lib"
	wget https://ftp.gnu.org/pub/gnu/ncurses/ncurses-6.2.tar.gz
	tar -xzvf ncurses-6.2.tar.gz
	cd ncurses-6.2
	./configure --prefix=$HOME --enable-shared

	$ modprobe bridge
	$ echo "net.bridge.bridge-nf-call-iptables = 1" >> /etc/sysctl.conf
	$ sysctl -p /etc/sysctl.conf

	sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-ip6tables: No such file or directory

	# SOLUTION
	$ modprobe br_netfilter
	$ sysctl -p /etc/sysctl.conf

	###################################################
	##
	## Alertmanager YAML configuration for routing.
	##
	## Will route alerts with a code_owner label to the slack-code-owners receiver
	## configured above, but will continue processing them to send to both a
	## central Slack channel (slack-monitoring) and PagerDuty receivers
	## (pd-warning and pd-critical)
	##

	----------------------------------------
	Setup Install HAProxy 1.8 on Ubuntu 16
	----------------------------------------
	sudo apt-get install software-properties-common
	sudo add-apt-repository ppa:vbernat/haproxy-1.8
	sudo apt-get update
	apt-cache policy haproxy
	sudo apt install haproxy
	sudo update-rc.d haproxy enable

	# ---- Base python ----
	FROM python:3.6 AS base
	# Create app directory
	WORKDIR /app

	# ---- Dependencies ----
	FROM base AS dependencies
	COPY gunicorn_app/requirements.txt ./
	# install app dependencies
	RUN pip install -r requirements.txt