docs: add instructions on building docker image to readme (#265)

* Add instructions on building docker image

Following the same method given in NextJs examples

* fix: prettier check

run prettier format to fix formatting issues

Author: Krish120003

template/base/README.md

@@ -30,6 +30,86 @@ We recommend deploying to [Vercel](https://vercel.com/?utm_source=t3-oss&utm_cam
 - Click **Deploy**
 - Now whenever you push a change to your repository, Vercel will automatically redeploy your website!
 
+You can also dockerize this stack and deploy a container.
+
+- In your next.config.mjs, add the `output: "standalone"` option to your config.
+- Create a `.dockerignore` file with the following contents:
+  ```
+  Dockerfile
+  .dockerignore
+  node_modules
+  npm-debug.log
+  README.md
+  .next
+  .git
+  ```
+- Create a `Dockerfile` with the following contents:
+
+  ```
+  # Install dependencies only when needed
+  FROM node:16-alpine AS deps
+  # Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
+  RUN apk add --no-cache libc6-compat
+  WORKDIR /app
+
+  # Install dependencies based on the preferred package manager
+  COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
+  RUN \
+      if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
+      elif [ -f package-lock.json ]; then npm ci; \
+      elif [ -f pnpm-lock.yaml ]; then yarn global add pnpm && pnpm i; \
+      else echo "Lockfile not found." && exit 1; \
+      fi
+
+
+  # Rebuild the source code only when needed
+  FROM node:16-alpine AS builder
+  WORKDIR /app
+  COPY --from=deps /app/node_modules ./node_modules
+  COPY . .
+
+  # 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 during the build.
+  # ENV NEXT_TELEMETRY_DISABLED 1
+
+  RUN yarn build
+
+  # If using npm comment out above and use below instead
+  # RUN npm run build
+
+  # Production image, copy all the files and run next
+  FROM node:16-alpine AS runner
+  WORKDIR /app
+
+  ENV NODE_ENV production
+  # Uncomment the following line in case you want to disable telemetry during runtime.
+  # ENV NEXT_TELEMETRY_DISABLED 1
+
+  RUN addgroup --system --gid 1001 nodejs
+  RUN adduser --system --uid 1001 nextjs
+
+  # 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 /app/package.json ./package.json
+
+  # Automatically leverage output traces to reduce image size
+  # https://nextjs.org/docs/advanced-features/output-file-tracing
+  COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+  COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+  USER nextjs
+
+  EXPOSE 3000
+
+  ENV PORT 3000
+
+  CMD ["node", "server.js"]
+  ```
+
+- You can now build an image to deploy yourself, or use a PaaS such as [Railway's](https://railway.app) automated [Dockerfile deployments](https://docs.railway.app/deploy/dockerfiles) to deploy your app.
+
 ## Useful resources
 
 Here are some resources that we commonly refer to: