feat: Add Docker Compose configuration for PostgreSQL and update database credentials in main.go

backend/cmd/api/main.go

@@ -26,12 +26,12 @@ import (
 
 //	@x-extension	ulid.ULID string
 
-//	@Summary		Say hello
-//	@Description	Get a hello message
-//	@ID				hello
-//	@Produce		plain
-//	@Success		200	{string}	string	"Hello from the Time Tracker Backend!"
-//	@Router			/ [get]
+// @Summary		Say hello
+// @Description	Get a hello message
+// @ID				hello
+// @Produce		plain
+// @Success		200	{string}	string	"Hello from the Time Tracker Backend!"
+// @Router			/ [get]
 func helloHandler(c *gin.Context) {
 	c.String(http.StatusOK, "Hello from the Time Tracker Backend!")
 }
@@ -41,9 +41,9 @@ func main() {
 	dbConfig := models.DatabaseConfig{
 		Host:     "localhost",
 		Port:     5432,
-		User:     "postgres",
+		User:     "timetracker",
 		Password: "password",
-		DBName:   "mydatabase",
+		DBName:   "timetracker",
 		SSLMode:  "disable", // For development environment
 	}