Add PocketBase client with contracts and sharp build tooling

.env.example

@@ -9,3 +9,10 @@ GITEA_TOKEN=
 # Base URL of the Gitea instance and the repo path issues belong to.
 GITEA_URL=https://gitea.anticarnist.de
 GITEA_REPO=Tom/Elternbeirat
+
+# PocketBase superuser login, used to read/write records via the REST API
+# (e.g. migrating content) without loosening the collection API rules -- a
+# superuser bypasses them. Create the superuser in the dashboard at <PB_URL>/_/.
+PB_URL=http://<unraid-host>:8090
+PB_ADMIN_EMAIL=
+PB_ADMIN_PASSWORD=