init: go api with CI/CD

main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+	"os"
+	"time"
+)
+
+type Response struct {
+	Service  string `json:"service"`
+	Message  string `json:"message"`
+	Time     string `json:"time"`
+	Hostname string `json:"hostname"`
+	Version  string `json:"version"`
+}
+
+func main() {
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		hostname, _ := os.Hostname()
+		resp := Response{
+			Service:  "demo-go-api",
+			Message:  "Hello from Go API!",
+			Time:     time.Now().Format(time.RFC3339),
+			Hostname: hostname,
+			Version:  os.Getenv("VERSION"),
+		}
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(resp)
+	})
+
+	http.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("ok"))
+	})
+
+	log.Printf("Listening on :%s", port)
+	log.Fatal(http.ListenAndServe(":"+port, nil))
+}