add docker for server demo

docker/mysql/conf.d/production.cnf

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+[mysqld]
+# Basic Settings
+default-storage-engine = innodb
+sql-mode = "STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
+max_connections = 200
+max_user_connections = 180
+
+# Character Set
+character-set-server = utf8mb4
+collation-server = utf8mb4_unicode_ci
+
+# InnoDB Settings
+innodb_buffer_pool_size = 1G
+innodb_buffer_pool_instances = 4
+innodb_log_file_size = 256M
+innodb_log_buffer_size = 64M
+innodb_flush_log_at_trx_commit = 2
+innodb_flush_method = O_DIRECT
+innodb_file_per_table = 1
+innodb_open_files = 400
+
+# Query Cache (disabled in MySQL 8.0+, but kept for compatibility)
+query_cache_type = OFF
+query_cache_size = 0
+
+# Temp Tables
+tmp_table_size = 64M
+max_heap_table_size = 64M
+
+# Logging
+slow_query_log = 1
+slow_query_log_file = /var/log/mysql/slow.log
+long_query_time = 2
+log_queries_not_using_indexes = 1
+
+# Binary Logging
+log-bin = mysql-bin
+binlog_format = ROW
+expire_logs_days = 7
+max_binlog_size = 100M
+
+# Safety
+max_allowed_packet = 64M
+bind-address = 0.0.0.0
+
+# Performance Schema
+performance_schema = ON
+performance_schema_max_table_instances = 400
+performance_schema_max_table_handles = 4000
+
+[mysql]
+default-character-set = utf8mb4
+
+[client]
+default-character-set = utf8mb4