add bash script to automate default setup

setup_default_backend.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/bash
+. bash_library.sh # source bash_library.sh
+
+log "install base debian-packaged-dep for backend..."
+sudo apt update
+sudo apt install python3 python3-venv python3-dev python3-pip
+sudo apt install redis-server
+
+log "install deps for dealing with most preview..."
+sudo apt install zlib1g-dev libjpeg-dev
+sudo apt install imagemagick libmagickwand-dev ghostscript
+sudo apt install libreoffice # most office documents file and text format
+sudo apt install inkscape # for .svg files.
+
+log "go to backend subdir.."
+cd backend || exit 1;
+
+log "setup python3 env.."
+python3 -m venv env
+source env/bin/activate
+pip install --upgrade pip setuptools
+
+log "install tracim-backend (sqlite_backend)..."
+pip install -e ".[testing]"
+
+
+log "configure tracim with default conf..."
+cp development.ini.sample development.ini
+cp wsgidav.conf.sample wsgidav.conf
+tracimcli db init
+
+log "backend of tracim was correctly set-up."