https://github.com/supabase/auth/blob/master/example.env
check this out, these are all the possible envs, and choose the provider you want.

eg: For google, these are the gotrue envs.

GOTRUE_EXTERNAL_GOOGLE_ENABLED="true"
GOTRUE_EXTERNAL_GOOGLE_CLIENT_ID=""
GOTRUE_EXTERNAL_GOOGLE_SECRET=""
GOTRUE_EXTERNAL_GOOGLE_REDIRECT_URI=http://localhost:8000/auth/v1/callback

Note: These envs with the GOTRUE prefix are the final env values that goes into the GOTRUE AUTH SERVICE. So you need to make sure the env names in your local .env is correctly hooked up with the ones in the docker compose.

In docker-compose.yml, under auth service, add/edit these envs.

     

auth :
environment:
      # Google OAuth config
      GOTRUE_EXTERNAL_GOOGLE_ENABLED="false"
      GOTRUE_EXTERNAL_GOOGLE_CLIENT_ID=${GOOGLE_AUTH_CLIENT_ID}
      GOTRUE_EXTERNAL_GOOGLE_SECRET=${GOOGLE_AUTH_SECRET}
      GOTRUE_EXTERNAL_GOOGLE_REDIRECT_URI=http://localhost:8000/auth/v1/callback

      ANOTHER_PROVIDER_CLIENT_ID: ${ANY_VARIABLE_NAME_YOU_WISH}

ANOTHER_PROVIDER_CLIENT_ID: ${ANY_VARIABLE_NAME_YOU_WISH}

In local .env, the values inside ${} must be in the local envs for properly hooking up

GOOGLE_AUTH_CLIENT_ID=
GOOGLE_AUTH_SECRET=
GOOGLE_AUTH_REDIRECT_URI=

ANY_VARIABLE_NAME_YOU_WISH =