Add CI/CD

Dockerfile

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+# From https://nextjs.org/docs/deployment
+
+# Rebuild the source code only when needed
+FROM node:alpine AS builder
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+# Production image, copy all the files and run next
+FROM node:alpine AS runner
+WORKDIR /app
+
+ENV NODE_ENV production
+
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S nextjs -u 1001
+
+# You only need to copy next.config.js if you are NOT using the default configuration
+# COPY --from=builder /app/next.config.js ./
+COPY --from=builder /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./package.json
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT 3000
+
+# Next.js collects completely anonymous telemetry data about general usage.
+# Learn more here: https://nextjs.org/telemetry
+# Uncomment the following line in case you want to disable telemetry.
+ENV NEXT_TELEMETRY_DISABLED 1
+
+CMD ["node_modules/.bin/next", "start"]