feat: escaped every variable properly

scripts/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 . /app/includes.sh
 
@@ -37,7 +37,7 @@ fi
 
 function configure_timezone() {
     if [[ ! -f /etc/localtime || ! -f /etc/timezone ]]; then
-        cp -f /usr/share/zoneinfo/${TIMEZONE} /etc/localtime
+        cp -f "/usr/share/zoneinfo/${TIMEZONE}" /etc/localtime
         echo "${TIMEZONE}" > /etc/timezone
     fi
 }
@@ -45,7 +45,7 @@ function configure_timezone() {
 function configure_cron() {
     local FIND_CRON_COUNT=$(crontab -l | grep -c 'backup.sh')
     if [[ ${FIND_CRON_COUNT} -eq 0 ]]; then
-        echo "${CRON} sh /app/backup.sh > /dev/stdout" >> /etc/crontabs/root
+        echo "${CRON} bash /app/backup.sh > /dev/stdout" >> /etc/crontabs/root
     fi
 }