Adding setup for postgres docker compose + connection from app.

2024/07/golang_demo1/main.go

@@ -1,13 +1,35 @@
 package main
 
 import (
+	"context"
 	"flag"
 	"fmt"
+	"github.com/go-pg/pg/v10"
 	"golang_demo1/handlers"
 	"net/http"
 )
 
 func main() {
+	var opt, errDb = pg.ParseURL("postgres://db_user:pass@localhost:5432/repo?sslmode=disable")
+	if errDb != nil {
+		panic("Failed to parse url: " + errDb.Error())
+	}
+	var db = pg.Connect(opt)
+
+	if db == nil {
+		panic("failed to connect to the database")
+	}
+
+	defer func(db *pg.DB) {
+		_ = db.Close()
+	}(db)
+
+	ctx := context.Background()
+
+	if err := db.Ping(ctx); err != nil {
+		panic("Failed to ping: " + err.Error())
+	}
+
 	portPtr := flag.Int("port", 8080, "port for webserver")
 	flag.Parse()
 	port := *portPtr