Add Essence 520 minimal DB, configs, and login/game Docker profile.

docker/initdb/99_grant_app_user.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+# Владелец всех таблиц public → POSTGRES_USER (после всех *.sql).
+set -eu
+psql -v ON_ERROR_STOP=1 --username "postgres" --dbname "$POSTGRES_DB" <<-EOSQL
+DO \$\$
+DECLARE
+  t text;
+BEGIN
+  FOR t IN SELECT tablename FROM pg_tables WHERE schemaname = 'public'
+  LOOP
+    EXECUTE format('ALTER TABLE IF EXISTS %I OWNER TO %I', t, '${POSTGRES_USER}');
+  END LOOP;
+END \$\$;
+EOSQL