Set POSTGRES_HOST_AUTH_METHOD environment variable (#4740)

Redash's docker-compose file will no longer bring up an environment from
a cold start due to recent upstream changes to the postgres image that
force the user to either set a password for the default superuser or
opt-in to allowing all connections without a password via environment
variable.

Upstream PR: docker-library/postgres#658
Related Discussion: docker-library/postgres#681

docker-compose.yml

@@ -62,6 +62,8 @@ services:
       - "15432:5432"
     command: "postgres -c fsync=off -c full_page_writes=off -c synchronous_commit=OFF"
     restart: unless-stopped
+    environment:
+      POSTGRES_HOST_AUTH_METHOD: "trust"
   email:
     image: djfarrelly/maildev
     ports: