diff --git a/package-lock.json b/package-lock.json
index 14ebb90..7916b6b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -475,7 +475,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -492,7 +491,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -509,7 +507,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -526,7 +523,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -543,7 +539,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -560,7 +555,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -577,7 +571,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -594,7 +587,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -611,7 +603,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -628,7 +619,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -645,7 +635,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -662,7 +651,6 @@
       "cpu": [
         "loong64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -679,7 +667,6 @@
       "cpu": [
         "mips64el"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -696,7 +683,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -713,7 +699,6 @@
       "cpu": [
         "riscv64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -730,7 +715,6 @@
       "cpu": [
         "s390x"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -747,7 +731,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -764,7 +747,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -781,7 +763,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -798,7 +779,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -815,7 +795,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -832,7 +811,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -849,7 +827,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -866,7 +843,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -883,7 +859,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1403,7 +1378,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1417,7 +1391,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1431,7 +1404,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1445,7 +1417,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1459,7 +1430,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1473,7 +1443,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1487,7 +1456,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1501,7 +1469,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1515,7 +1482,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1529,7 +1495,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1543,7 +1508,6 @@
       "cpu": [
         "loong64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1557,7 +1521,6 @@
       "cpu": [
         "loong64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1571,7 +1534,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1585,7 +1547,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1599,7 +1560,6 @@
       "cpu": [
         "riscv64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1613,7 +1573,6 @@
       "cpu": [
         "riscv64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1627,7 +1586,6 @@
       "cpu": [
         "s390x"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1641,7 +1599,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1655,7 +1612,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1669,7 +1625,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1683,7 +1638,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1697,7 +1651,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1711,7 +1664,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1725,7 +1677,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1739,7 +1690,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1934,7 +1884,7 @@
       "version": "20.19.33",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.33.tgz",
       "integrity": "sha512-Rs1bVAIdBs5gbTIKza/tgpMuG1k3U/UMJLWecIMxNdJFDMzcM5LOiLVRYh3PilWEYDIeUDv7bpiHPLPsbydGcw==",
-      "dev": true,
+      "devOptional": true,
       "license": "MIT",
       "dependencies": {
         "undici-types": "~6.21.0"
@@ -2691,7 +2641,6 @@
       "version": "0.24.2",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.24.2.tgz",
       "integrity": "sha512-+9egpBW8I3CD5XPe0n6BfT5fxLzxrlDzqydF3aviG+9ni1lDC/OvMHcxqEFV0+LANZG5R1bFMWfUrjVsdwxJvA==",
-      "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
       "bin": {
@@ -3115,7 +3064,6 @@
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
       "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
-      "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
       "optional": true,
@@ -3704,7 +3652,6 @@
       "version": "3.3.11",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.11.tgz",
       "integrity": "sha512-N8SpfPUnUp1bK+PMYW8qSWdl9U+wwNWI4QKxOYDy9JAro3WMX7p2OeVRF9v+347pnakNevPmiHhNmZ2HbFA76w==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -3897,7 +3844,6 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
       "integrity": "sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==",
-      "dev": true,
       "license": "ISC"
     },
     "node_modules/picomatch": {
@@ -3990,7 +3936,6 @@
       "version": "8.5.6",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz",
       "integrity": "sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -4211,7 +4156,6 @@
       "version": "4.57.1",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.57.1.tgz",
       "integrity": "sha512-oQL6lgK3e2QZeQ7gcgIkS2YZPg5slw37hYufJ3edKlfQSGGm8ICoxswK15ntSzF/a8+h7ekRy7k7oWc3BQ7y8A==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@types/estree": "1.0.8"
@@ -4474,7 +4418,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
       "integrity": "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==",
-      "dev": true,
       "license": "BSD-3-Clause",
       "engines": {
         "node": ">=0.10.0"
@@ -4764,7 +4707,7 @@
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
-      "dev": true,
+      "devOptional": true,
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
@@ -4784,14 +4727,13 @@
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
       "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
-      "dev": true,
+      "devOptional": true,
       "license": "MIT"
     },
     "node_modules/vite": {
       "version": "5.4.21",
       "resolved": "https://registry.npmjs.org/vite/-/vite-5.4.21.tgz",
       "integrity": "sha512-o5a9xKjbtuhY6Bi5S3+HvbRERmouabWbyUcpXXUA1u+GNUKoROi9byOJ8M0nHbHYHkYICiMlqxkg1KkYmm25Sw==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "esbuild": "^0.21.3",
diff --git a/src/lib/services/nostr/event-cache.ts b/src/lib/services/nostr/event-cache.ts
index c168143..11f7df0 100644
--- a/src/lib/services/nostr/event-cache.ts
+++ b/src/lib/services/nostr/event-cache.ts
@@ -4,7 +4,6 @@
  */
 
 import type { NostrEvent, NostrFilter } from '../../types/nostr.js';
-import { createHash } from 'crypto';
 import logger from '../logger.js';
 
 interface CacheEntry {
@@ -13,6 +12,22 @@ interface CacheEntry {
   ttl: number; // Time to live in milliseconds
 }
 
+/**
+ * Synchronous hash using a simple approach for cache keys
+ * Since we need synchronous hashing for cache keys, we'll use a simpler approach
+ * This is sufficient for cache key generation (doesn't need to be cryptographically secure)
+ */
+function simpleHash(str: string): string {
+  let hash = 0;
+  for (let i = 0; i < str.length; i++) {
+    const char = str.charCodeAt(i);
+    hash = ((hash << 5) - hash) + char;
+    hash = hash & hash; // Convert to 32-bit integer
+  }
+  // Convert to positive hex string
+  return Math.abs(hash).toString(16).padStart(8, '0');
+}
+
 /**
  * Generate cache key from filter
  * Creates a deterministic key based on filter parameters
@@ -35,7 +50,8 @@ function generateCacheKey(filter: NostrFilter): string {
     }, {} as Record<string, unknown>);
   
   const filterStr = JSON.stringify(sortedFilter);
-  return createHash('sha256').update(filterStr).digest('hex');
+  // Use simple hash for synchronous cache key generation
+  return simpleHash(filterStr);
 }
 
 /**
@@ -43,7 +59,7 @@ function generateCacheKey(filter: NostrFilter): string {
  */
 function generateMultiFilterCacheKey(filters: NostrFilter[]): string {
   const keys = filters.map(f => generateCacheKey(f)).sort();
-  return createHash('sha256').update(keys.join('|')).digest('hex');
+  return simpleHash(keys.join('|'));
 }
 
 export class EventCache {
diff --git a/vite.config.ts b/vite.config.ts
index 3406f32..74a22e3 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,6 +1,65 @@
 import { sveltekit } from '@sveltejs/kit/vite';
 import { defineConfig } from 'vite';
 
+// Suppress noisy plugin messages about externalized modules
+// These are expected for SSR builds and not actual problems
+const originalConsoleError = console.error;
+const originalConsoleWarn = console.warn;
+const originalConsoleLog = console.log;
+
+if (process.env.NODE_ENV === 'production' || process.argv.includes('build')) {
+  const shouldSuppress = (message: string): boolean => {
+    return (
+      message.includes('externalized for browser compatibility') ||
+      message.includes('[plugin:vite:resolve]') && message.includes('has been externalized')
+    );
+  };
+
+  console.error = (...args: any[]) => {
+    const message = args.join(' ');
+    if (shouldSuppress(message)) {
+      return;
+    }
+    originalConsoleError.apply(console, args);
+  };
+
+  console.warn = (...args: any[]) => {
+    const message = args.join(' ');
+    if (shouldSuppress(message)) {
+      return;
+    }
+    originalConsoleWarn.apply(console, args);
+  };
+
+  console.log = (...args: any[]) => {
+    const message = args.join(' ');
+    if (shouldSuppress(message)) {
+      return;
+    }
+    originalConsoleLog.apply(console, args);
+  };
+}
+
 export default defineConfig({
-  plugins: [sveltekit()]
+  plugins: [sveltekit()],
+  build: {
+    rollupOptions: {
+      onwarn(warning, warn) {
+        // Suppress warnings about externalized modules (expected for SSR builds)
+        if (
+          warning.code === 'MODULE_LEVEL_DIRECTIVE' ||
+          (typeof warning.message === 'string' && 
+           warning.message.includes('externalized for browser compatibility'))
+        ) {
+          return;
+        }
+        // Show other warnings
+        warn(warning);
+      }
+    },
+    // Increase chunk size warning limit to reduce noise
+    chunkSizeWarningLimit: 2000
+  },
+  // Reduce log level to suppress INFO messages
+  logLevel: 'warn'
 });