message: docs: add a heads up about dockerignore for multi-stage builds
diff: @@ -113,6 +113,9 @@ browser at `http://localhost:7000`
  ## Multi-stage Build
  +> NOTE: The `.dockerignore` is different in this setup, read on for more
  +> details.
  +
  This section describes how to set up a multi-stage Docker build that builds the
  entire project within Docker. This is typically slower than a host build, but is
  sometimes desired because Docker in Docker is not available in the build
  @@ -137,6 +140,7 @@ WORKDIR /app
  COPY package.json yarn.lock ./
  COPY packages packages
  +# Comment this out if you don't have any internal plugins
  COPY plugins plugins
  RUN find packages \! -name "package.json" -mindepth 2 -maxdepth 2 -exec rm -rf {} \+
  @@ -182,8 +186,9 @@ end up being properly installed.
  To speed up the build when not running in a fresh clone of the repo you should
  set up a `.dockerignore`. This one is different than the host build one, because
  -we want to have access to the source code of all packages for the build, but can
  -ignore any existing build output or dependencies:
  +we want to have access to the source code of all packages for the build. We can
  +however ignore any existing build output or dependencies on the host. For our
  +new `.dockerignore`, replace the contents of your existing one with this:
  ```text
  node_modules
  