fix(dockerfile): explicit port binding for Container App health probe

langgraph/Dockerfile

@@ -5,10 +5,8 @@ RUN npm install -g pnpm@10
 
 WORKDIR /app
 
-# Copy package files
+# Copy package files and install dependencies
 COPY package.json pnpm-lock.yaml ./
-
-# Install dependencies
 RUN pnpm install --frozen-lockfile
 
 # Copy source code
@@ -17,5 +15,6 @@ COPY . .
 # Expose LangGraph server port
 EXPOSE 2024
 
-# Start LangGraph server in production mode
-CMD ["pnpm", "exec", "langgraphjs", "dev", "--host", "0.0.0.0", "--no-browser"]
+# Use langgraphjs dev with explicit host binding
+# The --host flag ensures it binds to 0.0.0.0 not just localhost
+CMD ["pnpm", "exec", "langgraphjs", "dev", "--host", "0.0.0.0", "--port", "2024", "--no-browser"]