PORKBUN: New provider (#1819)

Co-authored-by: Tom Limoncelli <tlimoncelli@stackoverflow.com>

docs/_providers/porkbun.md

@@ -0,0 +1,41 @@
+---
+name: Porkbun
+title: Porkbun Provider
+layout: default
+jsId: PORKBUN
+---
+# Porkbun Provider
+
+## Configuration
+
+To use this provider, add an entry to `creds.json` with `TYPE` set to `PORKBUN`
+along with your `api_key` and `secret_key`. More info about authentication can be found in [Getting started with the Porkbun API](https://kb.porkbun.com/article/190-getting-started-with-the-porkbun-api).
+
+Example:
+
+```json
+{
+  "porkbun": {
+    "TYPE": "PORKBUN",
+    "api_key": "your-porkbun-api-key",
+    "secret_key": "your-porkbun-secret-key",
+  }
+}
+```
+
+## Metadata
+
+This provider does not recognize any special metadata fields unique to Porkbun.
+
+## Usage
+
+An example `dnsconfig.js` configuration:
+
+```js
+var REG_NONE = NewRegistrar("none");
+var DSP_PORKBUN = NewDnsProvider("porkbun");
+
+D("example.tld", REG_NONE, DnsProvider(DSP_PORKBUN),
+    A("test", "1.2.3.4")
+);
+```