RUN sed 's@AWS_ACCESS_KEY@'"${AWS_ACCESS_KEY:-UNDEFINED}"'@g; s@AWS_SECRET_KEY@'"${AWS_SECRET_KEY:-UNDEFINED}"'@g; s@MYSQL_GRAFANA_USER@'"${MYSQL_GRAFANA_USER:-UNDEFINED}"'@g; s@MYSQL_GRAFANA_PASSWORD@'"${MYSQL_GRAFANA_PASSWORD:-UNDEFINED}"'@g; s@MYSQL_GRAFANA_DB@'"${MYSQL_GRAFANA_DB:-UNDEFINED}"'@g' /etc/grafana/provisioning/datasources/datasources.tmpl > /etc/grafana/provisioning/datasources/datasources.yml