Update Dockerfile

Dockerfile

@@ -1,43 +1,23 @@
-FROM ubuntu:22.04
+FROM node:18-alpine
 
-# Install dependencies
-RUN apt-get update && apt-get install -y \
-    curl \
-    iptables \
-    iproute2 \
+# Install common tools
+RUN apk add --no-cache \
+    python3 \
+    py3-pip \
     git \
-    build-essential \
-    ca-certificates \
-    && rm -rf /var/lib/apt/lists/*
+    curl
 
-# Install gVisor runsc
-RUN curl -fsSL https://storage.googleapis.com/gvisor/releases/release/latest/x86_64/runsc \
-    -o /usr/local/bin/runsc && \
-    chmod +x /usr/local/bin/runsc
-
-RUN curl -fsSL https://storage.googleapis.com/gvisor/releases/release/latest/x86_64/containerd-shim-runsc-v1 \
-    -o /usr/local/bin/containerd-shim-runsc-v1 && \
-    chmod +x /usr/local/bin/containerd-shim-runsc-v1
-
-# Install Docker
-RUN curl -fsSL https://get.docker.com -o get-docker.sh && \
-    sh get-docker.sh && \
-    rm get-docker.sh
-
-# Configure Docker to use runsc runtime
-RUN mkdir -p /etc/docker && \
-    echo '{"runtimes":{"runsc":{"path":"/usr/local/bin/runsc","runtimeArgs":["--net-raw"]}}}' > /etc/docker/daemon.json
-
-# Install Node.js
-RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash - && \
-    apt-get install -y nodejs
-
-# Copy application
 WORKDIR /app
+
 COPY package*.json ./
 RUN npm install
+
 COPY . .
 
 EXPOSE 3001
 
+# Run as non-root
+RUN addgroup -S sandbox && adduser -S sandbox -G sandbox
+USER sandbox
+
 CMD ["node", "server.js"]