properly get env var in cronscripts after they were added to git

cronscripts/process_picking.sh

 #! /bin/bash
 
-source ~/scripts/vars
+# Récupère le dossier contenant ce script
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+source "$SCRIPT_DIR/vars"
 
 log_dir=~/cronlogs/process_picking
 MAXFILES=12960 # ~ 3 months every 5 minutes, 12 hours a day

cronscripts/record_absences.sh

 #! /bin/bash
 
-source ~/scripts/vars
+# Récupère le dossier contenant ce script
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+source "$SCRIPT_DIR/vars"
+
 log_dir=~/cronlogs/shifts
 MAXFILES=2920 # 1 year (8 times a day)
 curl -o ${log_dir}/$(date +%F_%T)_absences.log http://$ip:$dj_port/members/record_absences