fix: Install all dependencies in server Dockerfile for TypeScript build, then prune dev deps

server/Dockerfile

@@ -10,8 +10,8 @@ WORKDIR /app
 # Copy package files
 COPY package*.json ./
 
-# Install dependencies
-RUN npm install --omit=dev
+# Install all dependencies (including dev for build)
+RUN npm install
 
 # Copy source code
 COPY . .
@@ -19,6 +19,9 @@ COPY . .
 # Build TypeScript
 RUN npm run build
 
+# Remove dev dependencies after build
+RUN npm prune --omit=dev
+
 # Expose port
 EXPOSE 2567