Wanderer: bring back the wanderer-pb wrapper (#17874)

The path refactor in #16487 deleted the wrapper instead of pointing it
at the new layout, while the documented way to create the first
superuser is still wanderer-pb superuser upsert. Calling pocketbase
directly without --dir would quietly start an empty database. Install
the wrapper again, and write it on every update so containers set up
since then get it too.

ct/wanderer.sh

@@ -100,7 +100,6 @@ EOF
       -e "s|^MEILI_DB_PATH=.*|MEILI_DB_PATH=/opt/wanderer_data/meili_data|" \
       /opt/wanderer/.env
     sed -i "s|^db_path =.*|db_path = \"/opt/wanderer_data/meili_data\"|" /etc/meilisearch.toml
-    rm -f /usr/local/bin/wanderer-pb
 
     cat <<EOF >/etc/systemd/system/wanderer-pocketbase.service
 [Unit]
@@ -155,6 +154,16 @@ EOF
     msg_ok "Added POCKETBASE_PROXY_SECRET"
   fi
 
+  cat <<'EOF' >/usr/local/bin/wanderer-pb
+#!/usr/bin/env bash
+set -a
+source /opt/wanderer/.env
+set +a
+cd /opt/wanderer/db
+exec ./pocketbase "$@" --dir="$PB_DB_LOCATION"
+EOF
+  chmod +x /usr/local/bin/wanderer-pb
+
   if [[ -f /opt/wanderer_data/plugins/plugin.json ]]; then
     msg_info "Reinstalling wanderer plugins, one directory each"
     find /opt/wanderer_data/plugins -maxdepth 1 -type f -delete

install/wanderer-install.sh

@@ -54,6 +54,16 @@ PB_DB_LOCATION=/opt/wanderer_data/pb_data
 MEILI_DB_PATH=/opt/wanderer_data/meili_data
 EOF
 
+cat <<'EOF' >/usr/local/bin/wanderer-pb
+#!/usr/bin/env bash
+set -a
+source /opt/wanderer/.env
+set +a
+cd /opt/wanderer/db
+exec ./pocketbase "$@" --dir="$PB_DB_LOCATION"
+EOF
+chmod +x /usr/local/bin/wanderer-pb
+
 cat <<EOF >/etc/systemd/system/wanderer-pocketbase.service
 [Unit]
 Description=wanderer PocketBase