feat(proxy): Add reverse proxy feature

app/server/host.go

@@ -0,0 +1,41 @@
+package server
+
+import (
+	"net/http/httputil"
+	"net/url"
+
+	"git.secnex.io/secnex/api-gateway/config"
+)
+
+type Hosts map[string]*Host
+
+type Host struct {
+	ID     string
+	Name   string
+	Domain string
+	proxy  *httputil.ReverseProxy
+}
+
+func NewHosts(cfg *config.Configuration) Hosts {
+	hosts := make(Hosts)
+	for _, host := range cfg.Hosts {
+		hosts[host.ID] = NewHost(&host)
+	}
+	return hosts
+}
+
+func NewHost(host *config.Host) *Host {
+	return &Host{
+		ID:     host.ID,
+		Name:   host.Name,
+		Domain: host.Domain,
+		proxy: httputil.NewSingleHostReverseProxy(&url.URL{
+			Scheme: "https",
+			Host:   host.Domain,
+		}),
+	}
+}
+
+func (hs Hosts) GetHost(domain string) *Host {
+	return hs[domain]
+}