Added non-official support for arch-based distros

scripts/install.sh

@@ -210,9 +210,13 @@ preflight() {
   step "Checking system"
   if [[ ! -f /etc/arch-release ]]; then
     err "This installer only supports Arch Linux."
-    exit 1
+    warn "It doesn't officially support other arch-based distros"
+    warn "Only continue the installation if you know what you are doing"
+    confirm "Continue anyway ?" y || { echo; info "Aborting..."; exit 1; }
+    ok "Skipping system validation..."
+  else
+    ok "Arch Linux detected"
   fi
-  ok "Arch Linux detected"
 
   # Not root
   if [[ $EUID -eq 0 ]]; then