docs: Formalize Synology NAS repo standards with REQUIREMENTS.md, maintenance instructions, and setup guides. Fix service typos and standardize filenames.

SERVICE_SETUP_TEMPLATE.md

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+# Service Setup Guide: [Service Name]
+
+This document outlines the end-to-end flow for deploying [Service Name] on Synology NAS using Portainer.
+
+## 1. Pre-Setup (Manual)
+These steps must be performed in the Synology DSM web interface before running any scripts.
+
+### Create Service User
+- [ ] Go to **Control Panel > User & Group**.
+- [ ] Click **Create**.
+- [ ] Name: `svc-[service-name]` (e.g., `svc-paperless`).
+- [ ] Group: `users`.
+- [ ] **Important**: Record the Username and Password.
+
+### Get User IDs (PUID/PGID)
+- [ ] Open a terminal (SSH) to your Synology NAS.
+- [ ] Run: `id svc-[service-name]`.
+- [ ] Record the `uid` (PUID) and `gid` (PGID).
+  - *Note: Typically UID is >1024 and GID is 100 or 65536.*
+
+## 2. Infrastructure Setup (Automated/Scripted)
+These steps prepare the folder structure and permissions.
+
+### Run Setup Script
+- [ ] Navigate to the service folder: `/volume1/docker/portainer-stacks/[service-folder]`.
+- [ ] Run the creation script:
+  ```bash
+  sudo bash create_[service]_folders.sh
+  ```
+- This script creates all necessary folders in `/volume1/docker/` and `/volume1/media/` and assigns ownership to the service user.
+
+## 3. Portainer Deployment
+Final steps to launch the service.
+
+### Configure Environment
+- [ ] Copy `stack.env.example` to `stack.env` (if applicable) or prepare variables.
+- [ ] Update `PUID` and `PGID` with the values obtained in Step 1.
+
+### Deploy Stack
+- [ ] Go to **Portainer > Stacks > Add stack**.
+- [ ] Name the stack (e.g., `[service-name]`).
+- [ ] Paste the content of `docker-compose.portainer.yml`.
+- [ ] Load environment variables from `stack.env`.
+- [ ] Click **Deploy the stack**.