updated wiki on how to make server

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+# DDNS Setup
+
+## Porkbun API
+
+Follow this [porkbun](https://kb.porkbun.com/article/190-getting-started-with-the-porkbun-api) guide on enabling the api for your domain.
+
+## ddns-updater
+
+[ddns-updater](https://github.com/qdm12/ddns-updater) is the program used to update Porkbun's A record of your domain.
+
+### Docker install
+
+Install the [docker](https://docs.docker.com/engine/install/debian/) package from official docker repositories.
+
+### Setup
+
+Create a directory with config.json inside, and make sure that its owner has a uid of 1000.
+
+	mkdir data
+	touch data/config.json
+	# Owned by user ID of Docker container (1000)
+	chown -R 1000 data
+	# all access (for creating json database file data/updates.json)
+	chmod 700 data
+	# read access only
+	chmod 400 data/config.json
+
+Configuration for porkbun in config.json
+
+	{
+	  "settings": [
+	    {
+	      "provider": "porkbun",
+	      "domain": "domain.com",
+	      "host": "@",
+	      "api_key": "PORKBUN SECRET KEY",
+	      "secret_api_key": "PORKBUN API KEY",
+	      "ip_version": "ipv4"
+	    }
+	  ]
+	}
+	
+Optional `"ttl"` paramter specifing A record TTL not included.
+
+### Usage
+	docker run -d -p 8000:8000/tcp -v "$(pwd)"/data:/updater/data qmcgaw/ddns-updater
+	
+This will start a docker container that will start updating the DNS records.
+Status updates can be seen in a web server by going to localhost:8000.