delete Dockerfile.prod from frontend

frontend/Dockerfile.prod

@@ -1,20 +0,0 @@
-# Base layer
-FROM node:16-alpine
-
-# Set the working directory
-WORKDIR /app
-
-# Copy over dependency files 
-COPY package.json ./
-COPY package-lock.json ./
-
-# Install 
-RUN npm install --ignore-scripts
-
-# Copy over next.js config
-COPY next.config.js ./next.config.js
-
-# Copy all files 
-COPY . .
-
-CMD ["npm", "run", "start:docker"]