use environment variables from cloudflare's environment

trpc/server.ts

@@ -1,12 +1,21 @@
 import type { TSchema } from "@sinclair/typebox";
 import { TypeCompiler } from "@sinclair/typebox/compiler";
 import { initTRPC, TRPCError } from "@trpc/server";
+import type { getDb } from "../database/postgres";
+import type { getOpenrouter } from "../pages/chat/provider";
 
 /**
  * Initialization of tRPC backend
  * Should be done only once per backend!
  */
-const t = initTRPC.context<object>().create(/*{
+const t = initTRPC
+  .context<
+    object & {
+      db: ReturnType<typeof getDb>;
+      openrouter: ReturnType<typeof getOpenrouter>;
+    }
+  >()
+  .create(/*{
   sse: {
     maxDurationMs: 5 * 60 * 1_000, // 5 minutes
     ping: {