refactor: use dependency injection in backend

backend/internal/common/env_config.go

@@ -0,0 +1,31 @@
+package common
+
+import (
+	"github.com/caarlos0/env/v11"
+	_ "github.com/joho/godotenv/autoload"
+	"log"
+)
+
+type EnvConfigSchema struct {
+	AppEnv     string `env:"APP_ENV"`
+	AppURL     string `env:"PUBLIC_APP_URL"`
+	DBPath     string `env:"DB_PATH"`
+	UploadPath string `env:"UPLOAD_PATH"`
+	Port       string `env:"BACKEND_PORT"`
+	Host       string `env:"HOST"`
+}
+
+var EnvConfig = &EnvConfigSchema{
+	AppEnv:     "production",
+	DBPath:     "data/pocket-id.db",
+	UploadPath: "data/uploads",
+	AppURL:     "http://localhost",
+	Port:       "8080",
+	Host:       "localhost",
+}
+
+func init() {
+	if err := env.ParseWithOptions(EnvConfig, env.Options{}); err != nil {
+		log.Fatal(err)
+	}
+}