feat(Next.JS): Support server-side Next.JS usage

Next.JS disallows relative imports since 12.0.1 (see
https://nextjs.org/docs/messages/middleware-relative-urls for more
information).  So, we need to sniff out if we are in the NEXTJS
environment and if so, use the fallback URL.

This should resolve:
#174

[ Testing: deno task build ]

src/core/core.ts

@@ -13,6 +13,7 @@ async function unsafeInstantiate(module: any, url: string) {
     });
   } catch (_e) {
     // This only ever happens during SSR rendering
+    console.error(_e);
   }
 }
 

src/core/libs/cardano_message_signing/cardano_message_signing.generated.js

@@ -3806,12 +3806,25 @@ export function isInstantiated() {
   return instanceWithExports != null;
 }
 
+function requiresFallbackUrl() {
+  if (import.meta.url.includes("_frsh")) {
+    return true;
+  }
+  if (globalThis.process?.env?.VERCEL_ENV === 'production') {
+    return true;
+  }
+  if (globalThis.process?.env?.NEXT_RUNTIME === 'nodejs') {
+    return true;
+  }
+  return false;
+}
+
 /**
  * @param {InstantiateOptions} opts
  */
 async function instantiateModule(opts) {
   // Temporary exception for fresh framework
-  const wasmUrl = import.meta.url.includes("_frsh")
+  const wasmUrl = requiresFallbackUrl()
     ? opts.url
     : new URL("cardano_message_signing_bg.wasm", import.meta.url);
   const decompress = opts.decompress;

src/core/libs/cardano_multiplatform_lib/cardano_multiplatform_lib.generated.js

@@ -28591,12 +28591,25 @@ export function isInstantiated() {
   return instanceWithExports != null;
 }
 
+function requiresFallbackUrl() {
+  if (import.meta.url.includes("_frsh")) {
+    return true;
+  }
+  if (globalThis.process?.env?.VERCEL_ENV === 'production') {
+    return true;
+  }
+  if (globalThis.process?.env?.NEXT_RUNTIME === 'nodejs') {
+    return true;
+  }
+  return false;
+}
+
 /**
  * @param {InstantiateOptions} opts
  */
 async function instantiateModule(opts) {
   // Temporary exception for fresh framework
-  const wasmUrl = import.meta.url.includes("_frsh")
+  const wasmUrl = requiresFallbackUrl()
     ? opts.url
     : new URL("cardano_multiplatform_lib_bg.wasm", import.meta.url);
   const decompress = opts.decompress;