Merge pull request 'docs' (#2) from docs into main

Reviewed-on: https://gitea.home.com:3000/TolaMironcenko/dns_service/pulls/2

README.md

@@ -4,6 +4,9 @@
 - [build](#build)
 - [configure](#configure)
   - [example](#example)
+- [requests responses](#requests-responses)
+  - [/api/settings](#settings)
+  - [/api/settings/file](#settingsfile)
 
 ## routes
 
@@ -35,3 +38,46 @@ SERVER_PORT=8090
 
 SYSTEM_INITIALIZATION=rc
 ```
+
+## requests-responses
+
+### settings
+
+#### `/api/settings`
+
+```json
+{
+	"cache_size": 10000,
+	"hosts": {
+		"185.130.83.26": "gitea.home.com",
+		"192.168.3.1": "router.home.com",
+		"192.168.3.113": [
+			"samba.home.com",
+			"gitea.home.com",
+			"navidrome.home.com"
+		],
+		"192.168.3.119": [
+			"immich.home.com",
+			"jellyfin.home.com",
+			"portainer.home.com"
+		],
+		"192.168.3.155": "dns.home.com"
+	},
+	"resolv": [
+		"192.168.3.1",
+		"109.194.32.1",
+		"5.3.3.3",
+		"8.8.8.8"
+	]
+}
+```
+
+### settingsfile
+
+#### `/api/settings/file`
+
+```
+resolv-file=/etc/dnsmasq.conf.d/resolv.conf
+addn-hosts=/etc/dnsmasq.conf.d/hosts
+cache-size=10000
+```