style: consolidate env var names

config/sample.engine-api.docker.ini

@@ -7,16 +7,16 @@
 [database]
 # Use 'postgresql', 'sqlite' or 'mysql'. In case of SQLite the "db_name" is the name of the file.
 db_type="postgresql"
-db_name="${ENGINE_API_DB_NAME}"
-db_user="${ENGINE_API_DB_USER}"
-db_pass="${ENGINE_API_DB_PASS}"
-db_host="${ENGINE_API_DB_HOST}"
+db_name="${AURA_ENGINE_API_DB_NAME}"
+db_user="${AURA_ENGINE_API_DB_USER}"
+db_pass="${AURA_ENGINE_API_DB_PASS}"
+db_host="${AURA_ENGINE_API_DB_HOST}"
 db_charset="utf8"
 
 [monitoring]
 logdir="./logs"
 # possible values: debug, info, warning, error, critical
-loglevel="info"
+loglevel="${AURA_ENGINE_API_LOG_LEVEL}"
 debug_flask="false"
 
 [api]