Add Option "check_storage" and "check_container_ressources" (#249)

* Add Option "check_storage" and "check_container_ressources"

* Update misc/build.func

Co-authored-by: Håvard Gjøby Thom <34199185+havardthom@users.noreply.github.com>

* Update misc/build.func

Co-authored-by: Håvard Gjøby Thom <34199185+havardthom@users.noreply.github.com>

* Update misc/build.func

Co-authored-by: Håvard Gjøby Thom <34199185+havardthom@users.noreply.github.com>

* Final Version

- remove locals
- use var_variables
- show storage in percent
- harmonize some texts
- optimize Prompt (Continue anyway)

---------

Co-authored-by: Håvard Gjøby Thom <34199185+havardthom@users.noreply.github.com>

misc/build.func

@@ -7,6 +7,7 @@ variables() {
 # This function sets various color variables using ANSI escape codes for formatting text in the terminal.
 color() {
   YW=$(echo "\033[33m")
+  YWB=$(echo "\033[93m")
   BL=$(echo "\033[36m")
   RD=$(echo "\033[01;31m")
   BGN=$(echo "\033[4;92m")
@@ -501,6 +502,38 @@ install_script() {
   fi
 }
 
+check_container_resources() {
+  # Check actual RAM & Cores
+  current_ram=$(free -m | awk '/^Mem:/{print $2}')
+  current_cpu=$(nproc) 
+
+  # Check whether the current RAM is less than the required RAM or the CPU cores are less than required
+  if [[ "$current_ram" -lt "$var_ram" ]] || [[ "$current_cpu" -lt "$var_cpu" ]]; then
+    echo -e "\n⚠️${HOLD} ${GN}Required: ${var_cpu} CPU, ${var_ram}MB RAM ${CL}| ${RD}Current: ${current_cpu} CPU, ${current_ram}MB RAM${CL}"
+    echo -e "${YWB}Please ensure that the ${APP} LXC is configured with at least ${var_cpu} vCPU and ${var_ram} MB RAM for the build process.${CL}\n"
+    exit 1  
+  else
+    echo -e ""
+  fi
+}
+
+check_container_storage() {
+  # Check if the /boot partition is more than 80% full
+  total_size=$(df /boot --output=size | tail -n 1)
+  local used_size=$(df /boot --output=used | tail -n 1)
+  usage=$(( 100 * used_size / total_size ))
+  if (( usage > 80 )); then
+    # Prompt the user for confirmation to continue
+    echo -e "⚠️${HOLD} ${YWB}Warning: Storage is dangerously low (${usage}%).${CL}"
+    read -r -p "Continue anyway? <y/N>  " prompt  
+    # Check if the input is 'y' or 'yes', otherwise exit with status 1
+    if [[ ! ${prompt,,} =~ ^(y|yes)$ ]]; then
+      echo -e "❌${HOLD} ${YWB}Exiting based on user input.${CL}"
+      exit 1
+    fi
+  fi
+}
+
 start() {
   if command -v pveversion >/dev/null 2>&1; then
     if ! (whiptail --backtitle "Proxmox VE Helper Scripts" --title "${APP} LXC" --yesno "This will create a New ${APP} LXC. Proceed?" 10 58); then