If swap file exists, do nothing

this gives users more control on how to allocate swap

setup/start/cloudron-resize-fs.sh

@@ -4,6 +4,11 @@ set -eu -o pipefail
 
 readonly APPS_SWAP_FILE="/apps.swap"
 
+if [[ -f "${APPS_SWAP_FILE}" ]]; then
+    echo "Swap file already exists at /apps.swap . Skipping"
+    exit
+fi
+
 # all sizes are in mb
 readonly physical_memory=$(LC_ALL=C free -m | awk '/Mem:/ { print $2 }')
 readonly swap_size=$((${physical_memory} > 4096 ? 4096 : ${physical_memory})) # min(RAM, 4GB) if you change this, fix enoughResourcesAvailable() in client.js