Case insensitive User Input (#1475)

* Always lower User input

misc/alpine-install.func

@@ -86,7 +86,7 @@ network_check() {
   if ping -c 1 -W 1 1.1.1.1 &>/dev/null; then msg_ok "Internet Connected"; else
     msg_error "Internet NOT Connected"
     read -r -p "Would you like to continue anyway? <y/N> " prompt
-    if echo "$prompt" | grep -Eq "^(y|yes)$"; then
+    if [[ "${prompt,,}" =~ ^(y|yes)$ ]]; then
       echo -e " ⚠️  ${RD}Expect Issues Without Internet${CL}"
     else
       echo -e " 🖧  Check Network Settings"