Add Dockerfile (#4)

.dockerignore

@@ -0,0 +1,8 @@
+node_modules
+npm-debug.log
+.git
+.github
+.vscode
+*Dockerfile*
+.env
+.env.example

Dockerfile

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+FROM node:16.14.0-alpine3.15 AS base
+
+FROM base AS deps
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm install
+
+FROM base AS builder
+WORKDIR /app
+COPY . .
+COPY --from=deps /app/node_modules ./node_modules
+RUN npm run build && npm install --production --ignore-scripts --prefer-offline
+
+FROM base AS runner
+WORKDIR /app
+
+ENV NODE_OPTIONS="--max-http-header-size=81920"
+ENV NODE_ENV production
+
+RUN addgroup -g 1001 -S nodejs
+RUN adduser -S nextjs -u 1001
+
+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 4000
+
+CMD ["npm", "start"]