chore: serve everything on port 1337

User-facing port unified at 1337 — vibes-aligned and easier to remember
than 8080/8420. Updates: api default PORT, .env.example, docker-compose
mapping (1337:1337), healthcheck target, Dockerfile EXPOSE, Vite dev
proxy.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/api/src/config.ts

@@ -2,7 +2,7 @@ import { nip19 } from "nostr-tools";
 import { z } from "zod";
 
 const RawEnv = z.object({
-  PORT: z.coerce.number().int().min(1).max(65535).default(8080),
+  PORT: z.coerce.number().int().min(1).max(65535).default(1337),
   NODE_ENV: z.enum(["development", "production", "test"]).default("production"),
   LOG_LEVEL: z
     .enum(["fatal", "error", "warn", "info", "debug", "trace", "silent"])

apps/web/vite.config.ts

@@ -7,10 +7,10 @@ export default defineConfig({
     port: 5173,
     proxy: {
       "/api": {
-        target: "http://localhost:8080",
+        target: "http://localhost:1337",
         changeOrigin: true,
       },
-      "/healthz": "http://localhost:8080",
+      "/healthz": "http://localhost:1337",
     },
   },
   build: {