Add deploy script

deploy.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+target="$1"
+
+case "$target" in
+    "staging")
+        nix_package="schulischer-schabernack-staging"
+        directory="staging"
+        ;;
+    "production")
+        nix_package="schulischer-schabernack"
+        directory="production"
+        ;;
+    *)
+        echo "Invalid target ${SCHABERNACK_ENV}"
+        exit 1
+        ;;
+esac
+
+nix build -o "result-${target}" -L ".#${nix_package}"
+rsync -varzLP --delete "result-${target}/" "schabernack@yuzuru.sbruder.xyz:${directory}"