Update Dockerfile

Dockerfile

@@ -5,16 +5,16 @@ FROM node:14 AS build
 WORKDIR /usr/src/app
 
 # Copy package.json and package-lock.json for installing dependencies
-COPY package.json yarn.lock ./
+COPY package.json package-lock.json ./
 
 # Install dependencies
-RUN yarn install
+RUN npm install
 
 # Copy the entire project
 COPY . .
 
 # Build the project
-RUN yarn build
+RUN npm run build
 
 # Use a smaller image for the production environment
 FROM node:14-alpine
@@ -28,13 +28,13 @@ WORKDIR /usr/src/app
 # Copy from the "build" stage
 COPY --from=build /usr/src/app/.next ./.next
 COPY --from=build /usr/src/app/package.json ./package.json
-COPY --from=build /usr/src/app/yarn.lock ./yarn.lock
+COPY --from=build /usr/src/app/package-lock.json ./package-lock.json
 
 # Install only production dependencies
-RUN yarn install --production
+RUN npm install --production
 
 # Expose the port the app will run on
 EXPOSE 3000
 
 # Command to run the application
-CMD ["yarn", "start"]
+CMD ["npm", "start"]