docs: Add quickstart (#16)

Author: shrink

README.md

@@ -4,6 +4,15 @@ A very simple server that verifies Bluesky (atproto) handles using the
 [HTTPS well-known Method][atproto/resolution/well-known]; an alternative to
 managing many DNS records.
 
+## Quickstart
+
+```console
+curl -LO https://github.com/prompt/handles-server/releases/download/v1/handles-server-linux
+chmod +x handles-server-linux
+DID_PROVIDER="memory" MEMORY_DOMAINS="example.com" MEMORY_DIDS="alice.example.com@did:plc:001" \
+./handles-server-linux
+```
+
 ## Implementation
 
 A `handle` is a hostname (e.g: `alice.example.com`) which the server may or may

config.go

@@ -14,7 +14,7 @@ import (
 
 type Config struct {
 	Host string `env:"HOST" envDefault:"localhost"`
-	Port string `env:"PORT" envDefault:"80"`
+	Port string `env:"PORT" envDefault:"8080"`
 
 	Logger *slog.Logger `env:"LOG_LEVEL" envDefault:"error"`