<commit_before># Custom Image for Stackdriver Sandbox Project

## Updating the Custom Image
The Stackdriver Sandbox website currently points at the image stored in Google Container Registry (GCR). If a project developer wants to change the Custom Image, it is **not enough** to update the Dockerfile stored in this directory. The developer must additionally update the image stored in GCR.

Steps to update the image locally and from GCP are described below.

### Steps for updating Dockerfile locally
1. After changing the Dockerfile locally, build the Dockerfile. 

```bash
$ docker build -t cloudshell-image .
```

2. Set up docker to authenticate using `gcloud` (only if developer has not previously done this). *Note: Currently only developers with 'Owner' permissions can push images to GCR.*
<commit_msg>Made wording changes to README<commit_after># Custom Cloud Shell Image for Stackdriver Sandbox Project

## Updating the Custom Cloud Shell Image
The Stackdriver Sandbox website currently points at the image stored in Google Container Registry (GCR). If a project developer wants to change the Custom Image, it is **not enough** to update the Dockerfile stored in this directory. The developer must additionally update the image stored in GCR.

Steps to update the image locally and from GCP are described below.

### Steps for updating Dockerfile locally
1. After changing the Dockerfile locally, build the Dockerfile. 

```bash
$ docker build -t cloudshell-image .
```

2. Set up docker to authenticate using `gcloud` (only if developer has not previously done this). *Note: Currently only developers with 'Owner' permissions on the stackdriver-sandbox project (where GCR repo is located) can push images to the stackdriver-sandbox GCR.*

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