fix: [nextcloud] prevent datadir to be created in ``/var/www/html``

nextcloud/lib/common

@@ -109,6 +109,7 @@ create_occ_if_not_exists() {
                 read-0 LOGIN PASSWORD < "$PASSWORD_FILE" || exit 1
                 compose --debug --no-init --without-relation="$SERVICE_NAME":web-proxy run \
                         -v "$CHARM_PATH"/src/fake-apache:/usr/bin/apache \
+                        -e NEXTCLOUD_DATA_DIR=/var/lib/nextcloud/data \
                         -e NEXTCLOUD_ADMIN_USER=$LOGIN \
                         -e NEXTCLOUD_ADMIN_PASSWORD=$PASSWORD \
                         --rm --entrypoint /entrypoint.sh "$SERVICE_NAME" apache 2>&1
@@ -140,6 +141,7 @@ occ() {
     compose --debug -q --no-init --no-pre-deploy \
             --without-relation="$SERVICE_NAME":web-proxy run \
            "${occ_docker_run_opts[@]}" \
+            -e NEXTCLOUD_DATA_DIR=/var/lib/nextcloud/data \
             -v "$HOST_CHARM_STORE/${CHARM_REL_PATH#${CHARM_STORE}/}/src/occ.batch:/var/www/html/occ.batch" \
             -T --rm -u www-data "$SERVICE_NAME" /var/www/html/occ.batch "$@" | cat