chore: remove Render configs, point docs at VPS domains

frontend/src/lib/api.ts

@@ -6,7 +6,7 @@ export interface Row {
 }
 
 // Where the API lives. Empty means same-origin (the single-binary
-// deployment); Vercel builds set VITE_API_BASE to the Render service URL.
+// deployment); Vercel builds set VITE_API_BASE to the VPS API URL.
 export const apiBase = ((import.meta.env.VITE_API_BASE as string | undefined) ?? '').replace(/\/+$/, '')
 
 const apiUrl = (path: string) => `${apiBase}${path}`

render.yaml

@@ -1,15 +0,0 @@
-services:
-  - type: web
-    name: subidx
-    runtime: docker
-    plan: starter
-    region: oregon
-    healthCheckPath: /healthz
-    envVars:
-      - key: CORS_ORIGINS
-        sync: false
-        value: https://your-dashboard.vercel.app
-    disks:
-      - name: subidx-store
-        mountPath: /var/data
-        sizeGB: 5