Load API_BASE_URL from backend

- Remove api_base_url constant

pages/api/config.js

@@ -0,0 +1,4 @@
+export default function handler(req, res) {
+    // Return the API_BASE_URL. This Endpoint allows us to access the env Variable in client javascript
+    res.status(200).json({ apiBaseUrl: process.env.API_BASE_URL })
+}

src/constants.js

@@ -1,5 +1,3 @@
-exports.API_BASE_URL = 'https://api.covidpass.marvinsextro.de/'
-
 exports.VALUE_SET_BASE_URL = 'https://raw.githubusercontent.com/ehn-dcc-development/ehn-dcc-valuesets/main/'
 exports.VALUE_TYPES = {
     medicalProducts: 'vaccine-medicinal-product.json',

src/pass.js

@@ -45,7 +45,11 @@ exports.createPass = async function(data) {
     );
     zip.push({ path: 'manifest.json', data: manifestJson });
 
-    const response = await fetch(`${constants.API_BASE_URL}/sign`, {
+    // Load API_BASE_URL form nextjs backend
+    const configResponse = await fetch('/api/config')
+    const apiBaseUrl = (await configResponse.json()).apiBaseUrl
+
+    const response = await fetch(`${apiBaseUrl}/sign`, {
         method: 'POST',
         headers: {
           'Accept': 'application/octet-stream',