move to dotenv + custom env validations

ref #18

src/config.ts

@@ -1,8 +1,22 @@
-import * as dotenvSafe from "dotenv-safe";
-dotenvSafe.config();
+import { config as configDotenv } from 'dotenv';
+configDotenv();
 export const config = {
-    internal_port: process.env.APP_PORT || 4010,
+    internal_port: parseInt(process.env.APP_PORT) || 4010,
     development: process.env.NODE_ENV === "production",
     jwt_secret: process.env.JWT_SECRET || "secretjwtsecret",
     phone_validation_countrycode: process.env.PHONE_COUNTRYCODE || "ZZ"
-}
+}
+let errors = 0
+if (typeof config.internal_port !== "number") {
+    errors++
+}
+if (typeof config.phone_validation_countrycode !== "string") {
+    errors++
+}
+if (config.phone_validation_countrycode.length !== 2) {
+    errors++
+}
+if (typeof config.development !== "boolean") {
+    errors++
+}
+export let e = errors