iso: default --out to /mnt/5_hdd/felhom.eu/felhom-iso/out (env-overridable via $FELHOM_ISO_OUT)

scripts/iso/build-felhom-iso.sh

@@ -47,7 +47,7 @@ log_success() { echo -e "${GREEN}[OK]${NC} $1"; }
 log_dry()     { echo -e "${CYAN}[DRY-RUN]${NC} $1"; }
 die()         { log_error "$1"; exit 1; }
 
-PVE_ISO=""; ISO_SHA256=""; PROFILE=""; BOOTSTRAP_ENV=""; OUT_DIR="${HOME}/felhom-iso/out"; PVE_VERSION=""; DRY_RUN=false
+PVE_ISO=""; ISO_SHA256=""; PROFILE=""; BOOTSTRAP_ENV=""; OUT_DIR="${FELHOM_ISO_OUT:-/mnt/5_hdd/felhom.eu/felhom-iso/out}"; PVE_VERSION=""; DRY_RUN=false
 LOADER_CLI=""   # --loader override; empty = fall back to the profile, then the shim default.
 PAIRING=false   # --pairing: build the GENERIC secret-free ISO (slice C); no --bootstrap-env.
 usage() {
@@ -72,7 +72,8 @@ Options:
                          shim = stock MS-signed chain (Secure Boot OK on compliant firmware).
                          mkimage = monolithic grub-mkimage loader for cheap AMI boards that can't boot
                          the ISO's GRUB from USB (F1). UNSIGNED -> the target board needs Secure Boot OFF.
-  --out DIR             output directory (default: \$HOME/felhom-iso/out)
+  --out DIR             output directory (default: the DooPlex build root
+                        /mnt/5_hdd/felhom.eu/felhom-iso/out; override via \$FELHOM_ISO_OUT for other hosts)
   --pve-version VER     override PVE version tag (default: parsed from the ISO filename)
   --dry-run             print the steps without producing an ISO
   -h, --help            this help