Update Dockerfile

Dockerfile

@@ -1,9 +1,18 @@
 # Use the official Node.js image as the base image
 FROM node:14
 
+# Create a non-root user and group
+RUN groupadd -r appgroup && useradd -r -g appgroup -m appuser
+
 # Set the working directory inside the container
 WORKDIR /app
 
+# Change ownership of the working directory to the non-root user
+RUN chown -R appuser:appgroup /app
+
+# Switch to the non-root user
+USER appuser
+
 # Copy package.json and package-lock.json to the working directory
 COPY package*.json ./