Initial Go server with PostgreSQL and static file serving

main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	_ "github.com/lib/pq"
+)
+
+func main() {
+	dsn := os.Getenv("PGCONN")
+	if dsn == "" {
+		log.Fatal("PGCONN environment variable is required")
+	}
+
+	db, err := sql.Open("postgres", dsn)
+	if err != nil {
+		log.Fatalf("failed to open database: %v", err)
+	}
+	defer db.Close()
+
+	if err := db.Ping(); err != nil {
+		log.Fatalf("failed to connect to database: %v", err)
+	}
+	log.Println("connected to database")
+
+	http.Handle("/", http.FileServer(http.Dir("static")))
+
+	http.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
+		if err := db.Ping(); err != nil {
+			http.Error(w, "db unhealthy", http.StatusServiceUnavailable)
+			return
+		}
+		fmt.Fprintln(w, "ok")
+	})
+
+	log.Println("listening on :8080")
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}