Fix MariaDB bootstrap: use 'FLUSH PRIVILEGES' (no parentheses) and update .dockerignore

.dockerignore

@@ -0,0 +1,4 @@
+seafile-server/
+seahub/
+.seafile-data/
+.git

docker/entrypoint.sh

@@ -161,7 +161,7 @@ init_mariadb() {
   log "Configuring root password and seafile database"
   "${MYSQL_BIN}" --protocol=socket --socket=/run/mysqld/mysqld.sock -uroot <<-SQL
     ALTER USER 'root'@'localhost' IDENTIFIED BY '${DB_ROOT_PASSWORD}';
-    FLUSH PRIVILEGES();
+    FLUSH PRIVILEGES;
 SQL
 
   "${MYSQL_BIN}" --protocol=socket --socket=/run/mysqld/mysqld.sock -uroot -p"${DB_ROOT_PASSWORD}" <<-SQL
@@ -177,7 +177,7 @@ SQL
     GRANT ALL PRIVILEGES ON \`${DB_NAME_CCNET:-ccnet_db}\`.* TO '${DB_USER}'@'localhost';
     GRANT ALL PRIVILEGES ON \`${DB_NAME_SEAHUB:-seahub_db}\`.* TO '${DB_USER}'@'localhost';
 
-    FLUSH PRIVILEGES();
+    FLUSH PRIVILEGES;
 SQL
 
   log "Shutting down temporary MariaDB"