update dockerfile

Dockerfile

@@ -4,11 +4,11 @@ FROM node:20
 # Set the working directory
 WORKDIR /app
 
-# Copy package.json and yarn.lock to install dependencies
-COPY package.json yarn.lock ./
+# Copy package.json and package-lock.json into the container
+COPY package.json package-lock.json ./
 
-# Install dependencies using Yarn (use --frozen-lockfile for consistency)
-RUN yarn install --frozen-lockfile --unsafe-perm=true
+# Install dependencies using npm (use --legacy-peer-deps if you face dependency issues)
+RUN npm install --legacy-peer-deps --unsafe-perm=true
 
 # Create a non-root user and set permissions
 RUN useradd -m appuser
@@ -19,17 +19,14 @@ RUN chown -R appuser /app
 # Switch to the non-root user
 USER appuser
 
-# Copy the rest of the application code
+# Copy the rest of your application code into the container
 COPY . .
 
-# Create the .next directory (this can sometimes be needed to ensure build process has the right permissions)
-RUN mkdir -p /app/.next && chown -R appuser /app/.next
-
 # Build the Next.js app
-RUN yarn build
+RUN npm run build
 
 # Expose the port the app will run on
 EXPOSE 3000
 
 # Start the Next.js app
-CMD ["yarn", "start"]
+CMD ["npm", "start"]