Add package-based install method (#3743)

* Add runtime

* add procfile

* add settings for packaging

* use heroku buildpack

* maybe a hash works?

* try brnach instead of tag or hash

* remove reference alltogether

* maybe this syntax?

* switch back to normal buildpack

* and heroku again

* try official sample

* maybe a tar?

* just git clone?

* lower version

* lower version

* switch of settings

* try this again

* maybe install python before?

* no sudo?

* just build for ubuntu?

* set runtime lower and use custom buildpack

* remove initial command

* add release command

* do not collect static while releaseing

* switch to custom backend

* Update .pkgr.yml

* new backend

* upgrade runtime version

* consolidate env

* update python version

* add debian as target

* fix os name

* extend requirements

* remove release command

* remove ssl dep

* add worker command

* add scripts

* debug listing

* make scripts executable

* use python3

* add python install

* add python as dep

* debug step

* switch to app home

* set paths right

* check local command

* remove path

* update path

* add sample install script

* more debugging

* dbg msg

* more enviroment stuff

* more dbugging

* more defined install script

* reduce function

* add debug script

* and more

* remove before

* reduce lines

* cleanup deps

* maybe this way?

* rm "

* rename env

* fix files

* use dot annotation

* ls

* add msgs

* move activation

* ref?

* use source

* use point annotation

* remove activate

* create env and add it to the enviroment

* use full paths

* move python init

* use modern python

* use version numbers for ubuntu

* add default env vars ( for now)

* use export

* use shorthand command

* add more variables

* use apphome reference in paths

* add wasyprint dependencies

* also use wheels

* add gettext for comiling messages

* add nginx setting

* remove postgres from required stack

* refactor fiel configs

* make sure parent dirs exsist

* add wheels

* move python setup again

* update packe name

* update gunicron command

* move to config

* try cleaner procfile

* use python 3 wheels

* update service def

* Add enviroment settings to packaging

* restart nginx

* remove slack

* change nginx config name

* fix styles

* set permissions on update

* Add single line install to README

* move nginx names back

* use production sample as nginx config

* fix sed statement

* cleaner nginx setup

* keep configs in config file instead of packaging index

* fix sed connamds to remove spaces

* reintroduce spaces

* Also disable debug mode

* fix file permissions

* remove unneeded commands

* readd missing spaces

* add admin user generation

* Show public ipadress in final message

* small cleanups

* Add log to setup

* remove logging

* remove logging parts

* chown all dirs

* run update command as right user already

* set path before running command

* fix permission setup

* switch right assignment

* run commands with sudo

* pass in envs

* preserve only selected enviroment

* show enviroment variables

* silence curl

* fix envs

* clean up final message

* move nginx file to variable

* make admin creation conditional

* a bit more overview for setup variables

* test if nginx is available

* unlink instead of delet

* clean up functions

* well that was dumb

* ok double dumb - now i tested it

* use config for admin generation

* fix logic

* show value - not call it

* switch functions to sh

* fix syntax

* add admin data to exposed envs

* remove keeping of admin pwd

* switch to true/false

* make nginx file location configureable

* use gunicorn instead

* fix syntax

* set base dir

* move env to seperate function

* Also use/write database settings

* use conf values if available

* format sh

* update passed envs

* fix dep

* enable installing extra packages via env (ie database backends)

* ann more logging steps

* add more debuggin steps

* get local envs

* add more debug and reorder

* more code for testing

* fix call

* Add debug msg

* turn install quiet

* fix syntax

* reduce debugging

* add log step

* add datestamp

* add marker to inv execution

* fix syntax

* add codeowner

contrib/packager.io/postinstall.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+#
+# packager.io postinstall script
+#
+
+exec > >(tee ${APP_HOME}/log/setup_$(date +"%F_%H_%M_%S").log) 2>&1
+
+PATH=${APP_HOME}/env/bin:${APP_HOME}/:/sbin:/bin:/usr/sbin:/usr/bin:
+
+# import functions
+. ${APP_HOME}/contrib/packager.io/functions.sh
+
+# Envs that should be passed to setup commands
+export SETUP_ENVS=PATH,APP_HOME,INVENTREE_MEDIA_ROOT,INVENTREE_STATIC_ROOT,INVENTREE_PLUGINS_ENABLED,INVENTREE_PLUGIN_FILE,INVENTREE_CONFIG_FILE,INVENTREE_SECRET_KEY_FILE,INVENTREE_DB_ENGINE,INVENTREE_DB_NAME,INVENTREE_DB_USER,INVENTREE_DB_PASSWORD,INVENTREE_DB_HOST,INVENTREE_DB_PORT,INVENTREE_ADMIN_USER,INVENTREE_ADMIN_EMAIL,INVENTREE_ADMIN_PASSWORD,SETUP_NGINX_FILE,SETUP_ADMIN_PASSWORD_FILE,SETUP_NO_CALLS,SETUP_DEBUG,SETUP_EXTRA_PIP
+
+# Get the envs
+detect_local_env
+
+# default config
+export CONF_DIR=/etc/inventree
+export DATA_DIR=${APP_HOME}/data
+# Setup variables
+export SETUP_NGINX_FILE=${SETUP_NGINX_FILE:-/etc/nginx/sites-enabled/inventree.conf}
+export SETUP_ADMIN_PASSWORD_FILE=${CONF_DIR}/admin_password.txt
+export SETUP_NO_CALLS=${SETUP_NO_CALLS:-false}
+# SETUP_DEBUG can be set to get debug info
+# SETUP_EXTRA_PIP can be set to install extra pip packages
+
+# get base info
+detect_envs
+detect_docker
+detect_initcmd
+detect_ip
+
+# create processes
+create_initscripts
+create_admin
+
+# run updates
+stop_inventree
+update_or_install
+# Write config file
+if [ "${SETUP_CONF_LOADED}" = "true" ]; then
+  set_env
+fi
+start_inventree
+
+# show info
+final_message