Create a global Neo4j connection instance

src/db.ts

@@ -0,0 +1,6 @@
+import { auth, driver } from 'neo4j-driver';
+
+export const db = driver(
+  import.meta.env.NEO4J_DB_URI,
+  auth.basic(import.meta.env.NEO4J_USERNAME, import.meta.env.NEO4J_PASSWORD)
+);

src/env.d.ts

@@ -1 +1,12 @@
+/// <reference path="../.astro/types.d.ts" />
 /// <reference types="astro/client" />
+
+interface ImportMetaEnv {
+  readonly NEO4J_DB_URI: string;
+  readonly NEO4J_USERNAME: string;
+  readonly NEO4J_PASSWORD: string;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}