chore: Define base image for multi-stage Docker build (#4743)

docs/pages/blog/turbo-0-4-0.mdx

@@ -102,7 +102,7 @@ COPY --from=pruner /app/out/yarn.lock ./yarn.lock
 RUN yarn install
 
 # Copy source code of pruned subworkspace and build
-FROM base as builder
+FROM base AS builder
 WORKDIR /app
 COPY --from=pruner /app/.git ./.git
 COPY --from=pruner /app/out/full/ .

docs/pages/repo/docs/handbook/deploying-with-docker.mdx

@@ -114,7 +114,9 @@ Splitting up **dependencies** and **source files** in this way lets us **only ru
 Our detailed [`with-docker` example](https://github.com/vercel/turbo/tree/main/examples/with-docker) goes into depth on how to utilise `prune` to its full potential. Here's the Dockerfile, copied over for convenience.
 
 ```docker
-FROM node:alpine AS builder
+FROM node:18-alpine AS base
+
+FROM base AS builder
 RUN apk add --no-cache libc6-compat
 RUN apk update
 # Set working directory
@@ -124,7 +126,7 @@ COPY . .
 RUN turbo prune --scope=web --docker
 
 # Add lockfile and package.json's of isolated subworkspace
-FROM node:alpine AS installer
+FROM base AS installer
 RUN apk add --no-cache libc6-compat
 RUN apk update
 WORKDIR /app
@@ -139,7 +141,7 @@ RUN yarn install
 COPY --from=builder /app/out/full/ .
 RUN yarn turbo run build --filter=web...
 
-FROM node:alpine AS runner
+FROM base AS runner
 WORKDIR /app
 
 # Don't run production as root

examples/with-docker/apps/api/Dockerfile

@@ -1,7 +1,9 @@
+FROM node:18-alpine AS base
+
 # The web Dockerfile is copy-pasted into our main docs at /docs/handbook/deploying-with-docker.
 # Make sure you update this Dockerfile, the Dockerfile in the web workspace and copy that over to Dockerfile in the docs.
 
-FROM node:alpine AS builder
+FROM base AS builder
 # 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
 RUN apk update
@@ -12,7 +14,7 @@ COPY . .
 RUN turbo prune --scope=api --docker
 
 # Add lockfile and package.json's of isolated subworkspace
-FROM node:alpine AS installer
+FROM base AS installer
 RUN apk add --no-cache libc6-compat
 RUN apk update
 WORKDIR /app
@@ -36,7 +38,7 @@ COPY turbo.json turbo.json
 
 RUN yarn turbo run build --filter=api...
 
-FROM node:alpine AS runner
+FROM base AS runner
 WORKDIR /app
 
 # Don't run production as root

examples/with-docker/apps/web/Dockerfile

@@ -1,7 +1,9 @@
+FROM node:18-alpine AS base
+
 # This Dockerfile is copy-pasted into our main docs at /docs/handbook/deploying-with-docker.
 # Make sure you update both files!
 
-FROM node:alpine AS builder
+FROM base AS builder
 # 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
 RUN apk update
@@ -12,7 +14,7 @@ COPY . .
 RUN turbo prune --scope=web --docker
 
 # Add lockfile and package.json's of isolated subworkspace
-FROM node:alpine AS installer
+FROM base AS installer
 RUN apk add --no-cache libc6-compat
 RUN apk update
 WORKDIR /app
@@ -36,7 +38,7 @@ COPY turbo.json turbo.json
 
 RUN yarn turbo run build --filter=web...
 
-FROM node:alpine AS runner
+FROM base AS runner
 WORKDIR /app
 
 # Don't run production as root