hotfix(publicip): revert back JSON to public_ip

internal/models/publicip.go

@@ -0,0 +1,31 @@
+package models
+
+import "net"
+
+type PublicIP struct {
+	IP           net.IP `json:"public_ip,omitempty"`
+	Region       string `json:"region,omitempty"`
+	Country      string `json:"country,omitempty"`
+	City         string `json:"city,omitempty"`
+	Hostname     string `json:"hostname,omitempty"`
+	Location     string `json:"location,omitempty"`
+	Organization string `json:"organization,omitempty"`
+	PostalCode   string `json:"postal_code,omitempty"`
+	Timezone     string `json:"timezone,omitempty"`
+}
+
+func (p *PublicIP) Copy() (publicIPCopy PublicIP) {
+	publicIPCopy = PublicIP{
+		IP:           make(net.IP, len(p.IP)),
+		Region:       p.Region,
+		Country:      p.Country,
+		City:         p.City,
+		Hostname:     p.Hostname,
+		Location:     p.Location,
+		Organization: p.Organization,
+		PostalCode:   p.PostalCode,
+		Timezone:     p.Timezone,
+	}
+	copy(publicIPCopy.IP, p.IP)
+	return publicIPCopy
+}