Add api build and clean to makefile (files restructure) (#9)

* no message
* add clean api command

api/pkg/database/main.go

@@ -0,0 +1,25 @@
+package database
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"mizuserver/pkg/models"
+)
+
+const (
+	DBPath = "./entries.db"
+)
+
+var (
+	DB = initDataBase(DBPath)
+)
+
+func GetEntriesTable() *gorm.DB {
+	return DB.Table("mizu_entries")
+}
+
+func initDataBase(databasePath string) *gorm.DB {
+	temp, _ := gorm.Open(sqlite.Open(databasePath), &gorm.Config{})
+	_ = temp.AutoMigrate(&models.MizuEntry{}) // this will ensure table is created
+	return temp
+}