Adding setup for postgres docker compose + connection from app.

2024/07/golang_demo1/docker_compose.yml

@@ -0,0 +1,11 @@
+services:
+  db:
+    image: postgres:11
+    ports:
+      - '5432:5432'
+    volumes:
+    - '/opt/db_data:/var/lib/postgresql/data'
+    environment:
+      POSTGRES_PASSWORD: pass
+      POSTGRES_DB: repo
+      POSTGRES_USER: db_user

2024/07/golang_demo1/go.mod

@@ -1,3 +1,17 @@
 module golang_demo1
 
 go 1.22
+
+require (
+	github.com/go-pg/pg/v10 v10.13.0 // indirect
+	github.com/go-pg/zerochecker v0.2.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
+	github.com/vmihailenco/bufpool v0.1.11 // indirect
+	github.com/vmihailenco/msgpack/v5 v5.3.4 // indirect
+	github.com/vmihailenco/tagparser v0.1.2 // indirect
+	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	mellium.im/sasl v0.3.1 // indirect
+)

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