feat: Load database configuration from a centralized config package and add pgAdmin service to Docker Compose

backend/cmd/api/main.go

@@ -7,7 +7,6 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
-	"strconv"
 	"syscall"
 	"time"
 
@@ -16,10 +15,9 @@ import (
 	ginSwagger "github.com/swaggo/gin-swagger"
 	_ "github.com/timetracker/backend/docs" // This line is important for swag to work
 	"github.com/timetracker/backend/internal/api/routes"
+	"github.com/timetracker/backend/internal/config"
 	"github.com/timetracker/backend/internal/models"
 	_ "gorm.io/driver/postgres"
-	"gorm.io/gorm/logger"
-	// GORM IMPORTS MARKER
 )
 
 //	@title						Time Tracker API
@@ -42,37 +40,13 @@ func helloHandler(c *gin.Context) {
 }
 
 func main() {
-	// Get database configuration from environment variables
-	dbConfig := models.DatabaseConfig{
-		Host:     os.Getenv("DB_HOST"),
-		Port:     5432, // Default PostgreSQL port
-		User:     os.Getenv("DB_USER"),
-		Password: os.Getenv("DB_PASSWORD"),
-		DBName:   os.Getenv("DB_NAME"),
-		SSLMode:  os.Getenv("DB_SSLMODE"),
-	}
-
-	// Parse port if provided
-	if port := os.Getenv("DB_PORT"); port != "" {
-		if portInt, err := strconv.Atoi(port); err == nil && portInt > 0 {
-			dbConfig.Port = portInt
-		}
-	}
-
-	// Validate required configuration
-	if dbConfig.Host == "" || dbConfig.User == "" || dbConfig.Password == "" || dbConfig.DBName == "" {
-		log.Fatal("Missing required database configuration. Please set DB_HOST, DB_USER, DB_PASSWORD, and DB_NAME environment variables")
-	}
-
-	// Set log level based on environment
-	if gin.Mode() == gin.ReleaseMode {
-		dbConfig.LogLevel = logger.Error // Only log errors in production
-	} else {
-		dbConfig.LogLevel = logger.Info // Log more in development
+	cfg, err := config.LoadConfig()
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
 	}
 
 	// Initialize database
-	if err := models.InitDB(dbConfig); err != nil {
+	if err := models.InitDB(cfg.Database); err != nil {
 		log.Fatalf("Error initializing database: %v", err)
 	}
 	defer func() {