Update README.md

README.md

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-maxmind-self-api
+# Maxmind-Self-API <img src="https://img.shields.io/static/v1?label=code&message=Node.js&color=green" alt="">
+
+## Query
+- [ASN](#ASN)
+- [Country](#Country)
+- [City](#City)
+- [Geolocation (ASN,Country,City integrated query)](#Geolocation)
+
+### ASN
+### Requests
+```http
+GET /asn/<Query_IP>
+```
+| Parameter | Type | Description |
+| :--- | :--- | :--- |
+| `Query_IP` | `string` | IP for query |
+
+
+### Country
+### Requests
+```http
+GET /country/<Query_IP>
+```
+| Parameter | Type | Description |
+| :--- | :--- | :--- |
+| `Query_IP` | `string` | IP for query |
+
+### City
+### Requests
+```http
+GET /city/<Query_IP>
+```
+| Parameter | Type | Description |
+| :--- | :--- | :--- |
+| `Query_IP` | `string` | IP for query |
+
+### Geolocation
+### Requests
+```http
+GET /geolocation/<Query_IP>
+```
+| Parameter | Type | Description |
+| :--- | :--- | :--- |
+| `Query_IP` | `string` | IP for query |
+
+### Status Codes
+| Status Code | Description |
+| :--- | :--- |
+| 200 | information exists in Maxmind DB |
+| 404 | Non-existent path |
+| 422 | No information exists in Maxmind DB |
+
+### How to download database
+https://dev.maxmind.com/geoip/geoip2/geolite2/#Access