add local server docs

docs/local_server.md

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+
+# Local PeeringDB Mirror Using peeringdb-py (with Additional Notes from `local_setup.md`)
+
+Below is a **comprehensive guide** that combines the instructions for using the **`peeringdb-py`** containerized approach with additional details found in the official [PeeringDB `local_setup.md` docs](https://github.com/peeringdb/peeringdb/blob/master/docs/local_setup.md). The goal is to give you a single reference for:
+
+1. **Setting up a local PeeringDB instance** using the **`peeringdb-py`** tool.
+2. **Syncing and maintaining** your local data from the official PeeringDB.
+3. **Incorporating best practices** and extra notes from `local_setup.md` (including Docker tips, manual environment setup advice, etc.).
+
+---
+
+## 1. Overview
+
+Running a **local mirror** of PeeringDB lets you:
+
+- Develop or test scripts without hitting `https://api.peeringdb.com` directly.
+- Switch API endpoints between your local instance and the official one.
+- Have a stable, internal environment that can be kept in sync with the real-world PeeringDB data.
+
+### Methods to Run a Local Instance
+
+There are two primary methods:
+
+1. **Using the `peeringdb-py` Approach**
+   - Simplifies setup via a single CLI command: `peeringdb server --setup`.
+   - Automatically checks out **Docker Compose** configs to stand up a local PeeringDB + PostgreSQL environment.
+   - Provides built-in commands for data load and sync, as well as a process for keeping the data in sync.
+
+2. **Manual / Traditional Setup** (as described in `local_setup.md`)
+   - Clone the [PeeringDB repo](https://github.com/peeringdb/peeringdb) and manually configure Django, Python, Docker, etc.
+   - More flexible, but slightly more involved.
+   - Details in [local_setup.md](https://github.com/peeringdb/peeringdb/blob/master/docs/local_setup.md)
+
+Below, we’ll focus on the **`peeringdb-py`** approach, while pulling in important notes from `local_setup.md` to ensure you have the full picture.
+
+---
+
+## 2. Prerequisites
+
+1. **Python 3.8+** – Required for the `peeringdb-py` CLI.
+2. **Docker** (and **Docker Compose** if not already included with your Docker install).
+3. **Git** (optional, unless you want to also directly clone or reference PeeringDB’s code).
+
+---
+
+## 3. Install the `peeringdb` Python Package
+
+Install the `peeringdb` Python package (also referred to as `peeringdb-py`) which provides the CLI:
+
+```bash
+pip install --upgrade peeringdb
+```
+
+## 4. Run the Server Setup
+
+```sh
+peeringdb server --setup
+```
+
+What --setup Does
+
+1. clones the peeringdb_server git repo to use the current setup script.
+2. Uses the cloned docker-compose.yml and environment files to create a local PeeringDB server.
+3. loads and syncs data with public data
+4. creates an auto sync process to keep it running.
+5. starts serving data on http://localhost:8000
+
+Once complete, you should should be able to go to `http://localhost:8000` in your browser and see the PeeringDB interface.
+
+
+## 5. Using the Local PeeringDB
+
+When your local PeeringDB is live, we commend just defining you can switch any scripts that normally do:
+
+Depending on how your scripts are written, you may need to adjust the API endpoint they use. For example, if you have a script that hits the PeeringDB API, you might change the endpoint from:
+
+```python
+# real endpoint
+REAL_PEERINGDB_API_ENDPOINT = "https://api.peeringdb.com"
+
+# local endpoint
+LOCAL_PEERINGDB_API_ENDPOINT = "http://localhost:8000/api"
+
+PEERINGDB_API_ENDPOINT = os.getenv("PEERINGDB_API_ENDPOINT", LOCAL_PEERINGDB_API_ENDPOINT)
+```
+
+If you wish to serve it locally, you can use nginx to reverse proxy the local server to a domain name. This is useful if you have scripts that rely on a domain name to access the API.
+
+For example, you can add something similar to the following to your nginx configuration:
+
+```nginx
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+
+    server_name peeringdb.local;
+
+    error_log   /var/log/nginx/peeringdb-error.log;
+    access_log  /var/log/nginx/peeringdb-access.log;
+
+    location / {
+        proxy_pass http://127.0.0.1:8000/;
+        proxy_set_header Host $host;
+        proxy_buffering off;
+    }
+}
+```
+
+
+
+