diff --git a/Dockerfile b/Dockerfile
index 8b8b2c7..9e460d3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,8 @@ RUN apk add --no-cache \
     make \
     python3 \
     curl \
-    ca-certificates
+    ca-certificates \
+    vips-dev
 
 # Configure npm for better reliability
 RUN npm config set strict-ssl false
@@ -16,18 +17,24 @@ RUN npm config set registry https://registry.npmjs.org/
 RUN npm config set fetch-retry-mintimeout 20000
 RUN npm config set fetch-retry-maxtimeout 120000
 
-# Copy package files
-COPY package*.json ./
+# Install global packages needed for build
+RUN npm install -g typescript shx
 
-# Clean npm cache and install dependencies
+# Copy package files and modify to prevent prepare script from running
+COPY package*.json ./
+RUN node -e "const pkg = require('./package.json'); delete pkg.scripts.prepare; require('fs').writeFileSync('./package.json', JSON.stringify(pkg, null, 2));"
+
+# Install dependencies without running the prepare script, including sharp with the correct platform
 RUN npm cache clean --force && \
-    npm install --legacy-peer-deps --no-optional
+    npm install --legacy-peer-deps --no-optional && \
+    npm install --platform=linuxmusl --arch=x64 sharp
 
 # Copy source code
 COPY . .
 
-# Build TypeScript code
-RUN npm run build
+# Build TypeScript code manually
+RUN npx tsc && \
+    npx shx chmod +x dist/*.js
 
 # Switch to production for runtime
 ENV NODE_ENV=production
diff --git a/src/openrouter-api.ts b/src/openrouter-api.ts
index 0a0803e..84ef5ab 100644
--- a/src/openrouter-api.ts
+++ b/src/openrouter-api.ts
@@ -1,5 +1,5 @@
 import axios, { AxiosError, AxiosInstance } from 'axios';
-import { McpError } from '@modelcontextprotocol/sdk/types.js';
+import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
 
 /**
  * Client for interacting with the OpenRouter API
@@ -90,7 +90,7 @@ export class OpenRouterAPIClient {
       if (axiosError.response) {
         const responseData = axiosError.response.data as any;
         const message = responseData?.error?.message || axiosError.message;
-        throw new McpError('RequestFailed', `OpenRouter API error: ${message}`);
+        throw new McpError(ErrorCode.InternalError, `OpenRouter API error: ${message}`);
       }
     }
     
@@ -114,17 +114,17 @@ export class OpenRouterAPIClient {
         const message = responseData?.error?.message || axiosError.message;
         
         if (status === 401 || status === 403) {
-          throw new McpError('Unauthorized', `Authentication error: ${message}`);
+          throw new McpError(ErrorCode.InvalidRequest, `Authentication error: ${message}`);
         } else if (status === 429) {
-          throw new McpError('RateLimitExceeded', `Rate limit exceeded: ${message}`);
+          throw new McpError(ErrorCode.InternalError, `Rate limit exceeded: ${message}`);
         } else {
-          throw new McpError('RequestFailed', `OpenRouter API error (${status}): ${message}`);
+          throw new McpError(ErrorCode.InternalError, `OpenRouter API error (${status}): ${message}`);
         }
       } else if (axiosError.request) {
-        throw new McpError('NetworkError', `Network error: ${axiosError.message}`);
+        throw new McpError(ErrorCode.ConnectionClosed, `Network error: ${axiosError.message}`);
       }
     }
     
-    throw new McpError('UnknownError', `Unknown error: ${error.message || 'No error message'}`);
+    throw new McpError(ErrorCode.InternalError, `Unknown error: ${error.message || 'No error message'}`);
   }
 }
diff --git a/src/tool-handlers/analyze-image.ts b/src/tool-handlers/analyze-image.ts
index 3355e78..c594179 100644
--- a/src/tool-handlers/analyze-image.ts
+++ b/src/tool-handlers/analyze-image.ts
@@ -1,7 +1,7 @@
 import path from 'path';
 import { promises as fs } from 'fs';
 import sharp from 'sharp';
-import { McpError } from '@modelcontextprotocol/sdk/types.js';
+import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
 import OpenAI from 'openai';
 
 export interface AnalyzeImageToolRequest {
@@ -21,7 +21,7 @@ export async function handleAnalyzeImage(
     // Validate image path
     const imagePath = args.image_path;
     if (!path.isAbsolute(imagePath)) {
-      throw new McpError('InvalidParams', 'Image path must be absolute');
+      throw new McpError(ErrorCode.InvalidParams, 'Image path must be absolute');
     }
     
     // Read image file
@@ -85,7 +85,7 @@ export async function handleAnalyzeImage(
     // Call OpenRouter API
     const completion = await openai.chat.completions.create({
       model,
-      messages,
+      messages: messages as any,
     });
     
     return {
diff --git a/src/tool-handlers/get-model-info.ts b/src/tool-handlers/get-model-info.ts
index ab7f804..47bef5e 100644
--- a/src/tool-handlers/get-model-info.ts
+++ b/src/tool-handlers/get-model-info.ts
@@ -1,4 +1,4 @@
-import { McpError } from '@modelcontextprotocol/sdk/types.js';
+import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
 import { ModelCache } from '../model-cache.js';
 
 export interface GetModelInfoToolRequest {
@@ -26,7 +26,7 @@ export async function handleGetModelInfo(
     
     const model = modelCache.getModel(args.model);
     if (!model) {
-      throw new McpError('NotFound', `Model '${args.model}' not found`);
+      throw new McpError(ErrorCode.InvalidParams, `Model '${args.model}' not found`);
     }
     
     return {
diff --git a/src/tool-handlers/multi-image-analysis.ts b/src/tool-handlers/multi-image-analysis.ts
index 3e81c59..e9dfa63 100644
--- a/src/tool-handlers/multi-image-analysis.ts
+++ b/src/tool-handlers/multi-image-analysis.ts
@@ -1,6 +1,6 @@
 import fetch from 'node-fetch';
 import sharp from 'sharp';
-import { McpError } from '@modelcontextprotocol/sdk/types.js';
+import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
 import OpenAI from 'openai';
 
 export interface MultiImageAnalysisToolRequest {
@@ -90,11 +90,11 @@ export async function handleMultiImageAnalysis(
   try {
     // Validate inputs
     if (!args.images || args.images.length === 0) {
-      throw new McpError('InvalidParams', 'At least one image is required');
+      throw new McpError(ErrorCode.InvalidParams, 'At least one image is required');
     }
     
     if (!args.prompt) {
-      throw new McpError('InvalidParams', 'A prompt is required');
+      throw new McpError(ErrorCode.InvalidParams, 'A prompt is required');
     }
     
     // Prepare content array for the message
@@ -137,7 +137,7 @@ export async function handleMultiImageAnalysis(
       messages: [{
         role: 'user',
         content
-      }]
+      }] as any
     });
     
     return {