feat: add .env.example for all

src/pocketbase/.env.example

@@ -1,3 +1,12 @@
+# PocketBase Version
+PB_VERSION=0.30.0
+
+# Port to bind to on the host machine
+PB_PORT=8090
+
+# Optional 32-character encryption key (generate with: openssl rand -hex 16)
 PB_ENCRYPTION=
-PB_ADMIN_EMAIL=
-PB_ADMIN_PASSWORD=
+
+# Admin user configuration
+PB_ADMIN_EMAIL=admin@example.com
+PB_ADMIN_PASSWORD=supersecret123