Document that the `DOCKER_BUILDKIT=1` flag is needed to build the docker image. (#13515)

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reivilibre 2022-08-12 13:25:47 +00:00 committed by GitHub
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Document that the `DOCKER_BUILDKIT=1` flag is needed to build the docker image.

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@ -191,7 +191,7 @@ If you need to build the image from a Synapse checkout, use the following `docke
build` command from the repo's root:
```
docker build -t matrixdotorg/synapse -f docker/Dockerfile .
DOCKER_BUILDKIT=1 docker build -t matrixdotorg/synapse -f docker/Dockerfile .
```
You can choose to build a different docker image by changing the value of the `-f` flag to