docker-compose.yaml is using the wrong build directory

[Half-Shot]

0d25724#diff-ebacf6f6ae4ee68078bb16454b23247d moved the Dockerfile to ./docker which means it no longer works.

[alxmhe]

in the example docker-compose.yml, and if you cloned the synapse repository in the same directory as your docker-compose.yml file, you can replace build: ../.. with :

build:
  context: ./synapse
  dockerfile: ./docker/Dockerfile

[richvdh]

I think maybe this was fixed by #3778?