feat: add payment module

platform/config/dotenv.ts

@@ -1,6 +1,8 @@
+import { join } from "node:path";
+
 import { load } from "@std/dotenv";
 
-const env = await load();
+const env = await load({ envPath: getDotEnvPath(), export: true });
 
 /**
  * TODO ...
@@ -8,3 +10,11 @@ const env = await load();
 export function getDotEnvVariable(key: string): string {
   return env[key] ?? Deno.env.get(key);
 }
+
+function getDotEnvPath(): string {
+  const dirname = import.meta.dirname;
+  if (dirname === undefined) {
+    throw new Error("Unable to determine dirname in config");
+  }
+  return join(dirname, "..", "..", ".env");
+}