Fix fetch URL resolution when served under a subpath

k8s/deployment.yaml

@@ -15,7 +15,7 @@ spec:
     spec:
       containers:
         - name: m1730-generator
-          image: git.baumann.gr/adebaumann/m1730-generator:0.2
+          image: git.baumann.gr/adebaumann/m1730-generator:0.3
           imagePullPolicy: Always
           ports:
             - containerPort: 5000

web/templates/index.html

@@ -177,7 +177,8 @@
       const status = document.getElementById('status');
       status.textContent = 'Generating…';
       try {
-        const resp = await fetch('generate', {
+        const base = window.location.href.split('?')[0].replace(/\/?$/, '/');
+        const resp = await fetch(base + 'generate', {
           method: 'POST',
           body: new FormData(document.getElementById('form')),
         });