adding summarization and restructure project

golang/cmd/frontend/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"crowsnest/internal/model/database"
+	"database/sql"
+	"log"
+	"net/http"
+	"os"
+
+	_ "github.com/lib/pq"
+)
+
+type App struct {
+	articles *database.ArticleModel
+}
+
+func main() {
+	// collect environement variables
+	databaseURL := os.Getenv("DB_URL")
+
+	// connect to database
+	db, err := sql.Open("postgres", databaseURL)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	// define app
+	app := &App{
+		articles: &database.ArticleModel{DB: db},
+	}
+
+	// start web server
+	server := http.Server{
+		Addr:    ":8080",
+		Handler: app.routes(),
+	}
+
+	log.Println("server started, listening on :8080")
+	server.ListenAndServe()
+}