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I'm using `@pulumi/docker` to build an image and i always get this warning. Why is it a warning?
```warning: #1 [internal] load build definition from Dockerfile```

Hi <@U01E4107Y07> do you have some code you could share please ?

I found some refs on this and I'll ping my colleagues to check it's ok.

This is happening on any image I build with Pulumi, but here is one example of some of my code
```const repo = new Repository("logfiles", {
  name: `repo/name`,
})

const gitCommitSha = execSync("git rev-parse HEAD").toString().trim()

export const image = new docker.Image("image", {
  imageName: interpolate`${repo.repositoryUrl}:${gitCommitSha}`,
  build: {
    context: `../`,
    dockerfile: `../Dockerfile`,
  },
})```
the Dockerfile is pretty simple
```FROM node:16-alpine

WORKDIR /code
COPY package.json package-lock.json ./
RUN npm install
COPY . .

ENTRYPOINT ["npm", "run", "start"]```
package.json versions
```        "@pulumi/docker": "^3.0.0",
        "@pulumi/pulumi": "^3.0.0",```
pulumi version
```v3.3.0```