Add Docker infrastructure for dev and prod environments

- Separate PHP Dockerfiles (dev/prod) with extensions and prod opcache/php.ini optimization
- docker-compose-dev: PHP, PostgreSQL, Redis, Messenger, Mailpit, RedisInsight
- docker-compose-prod: 2x PHP replicas, PgSQL master/slave with PgBouncer, 2x Messenger, Redis
- Makefile with build/start/stop/purge commands
- AGENT.md to restrict AI access to the repository

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker/pgsql/init-master.sql

@@ -0,0 +1,2 @@
+CREATE USER replicator WITH REPLICATION ENCRYPTED PASSWORD 'e-ticket';
+SELECT pg_create_physical_replication_slot('slave_slot');

docker/pgsql/init-slave.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+until pg_isready -h db-master -U e-ticket; do
+  echo "Waiting for master..."
+  sleep 2
+done
+
+rm -rf /var/lib/postgresql/data/*
+pg_basebackup -h db-master -D /var/lib/postgresql/data -U replicator -Fp -Xs -P -R
+
+echo "hot_standby = on" >> /var/lib/postgresql/data/postgresql.conf

docker/pgsql/pgbouncer.ini

@@ -0,0 +1,19 @@
+[databases]
+e-ticket = host=db-master port=5432 dbname=e-ticket
+e-ticket_readonly = host=db-slave port=5432 dbname=e-ticket
+
+[pgbouncer]
+listen_addr = 0.0.0.0
+listen_port = 6432
+auth_type = md5
+auth_file = /etc/pgbouncer/userlist.txt
+pool_mode = transaction
+max_client_conn = 200
+default_pool_size = 20
+min_pool_size = 5
+reserve_pool_size = 5
+reserve_pool_timeout = 3
+server_lifetime = 3600
+server_idle_timeout = 600
+log_connections = 0
+log_disconnections = 0

docker/pgsql/userlist.txt

@@ -0,0 +1 @@
+"e-ticket" "md5f79275ff8ae69fcb9e6218d88e699961"