feat: production deployment — Dockerfile, docker-compose, SPA serving, classic bot fights

- Add Dockerfile (multi-stage: build frontend + server, serve from single container)
- Add docker-compose.yml for Portainer stack deployment
- Server serves frontend SPA in production (static assets + SPA fallback)
- Auto-run migrations and seed mock bots on server startup
- DB path configurable via DB_PATH env var
- Add "Fight a Classic Bot" button for instant mock bot matches
- FIGHT button queues for real AI opponents

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/db/startup.ts

@@ -0,0 +1,76 @@
+import { sqlite } from './index.js'
+
+export function runMigrations() {
+  sqlite.exec(`
+    CREATE TABLE IF NOT EXISTS bots (
+      id TEXT PRIMARY KEY,
+      name TEXT NOT NULL UNIQUE,
+      webhook_url TEXT NOT NULL,
+      avatar_seed TEXT NOT NULL,
+      archetype TEXT NOT NULL DEFAULT 'standard',
+      secret_hash TEXT NOT NULL,
+      public_key TEXT,
+      profile_pic_url TEXT,
+      elo_rating REAL NOT NULL DEFAULT 1200,
+      wins INTEGER NOT NULL DEFAULT 0,
+      losses INTEGER NOT NULL DEFAULT 0,
+      win_streak INTEGER NOT NULL DEFAULT 0,
+      best_streak INTEGER NOT NULL DEFAULT 0,
+      tier INTEGER NOT NULL DEFAULT 0,
+      is_active INTEGER NOT NULL DEFAULT 1,
+      last_fight_at TEXT,
+      consecutive_errors INTEGER NOT NULL DEFAULT 0,
+      last_error_at TEXT,
+      created_at TEXT NOT NULL
+    );
+
+    CREATE TABLE IF NOT EXISTS fights (
+      id TEXT PRIMARY KEY,
+      bot_a_id TEXT NOT NULL REFERENCES bots(id),
+      bot_b_id TEXT NOT NULL REFERENCES bots(id),
+      arena TEXT NOT NULL,
+      status TEXT NOT NULL DEFAULT 'scheduled',
+      winner_id TEXT REFERENCES bots(id),
+      bot_a_hp INTEGER NOT NULL DEFAULT 200,
+      bot_b_hp INTEGER NOT NULL DEFAULT 200,
+      total_rounds INTEGER NOT NULL DEFAULT 0,
+      scheduled_at TEXT,
+      started_at TEXT,
+      ended_at TEXT,
+      created_at TEXT NOT NULL
+    );
+
+    CREATE TABLE IF NOT EXISTS rounds (
+      id TEXT PRIMARY KEY,
+      fight_id TEXT NOT NULL REFERENCES fights(id),
+      round_number INTEGER NOT NULL,
+      challenge_type TEXT NOT NULL,
+      challenge_data TEXT NOT NULL,
+      bot_a_response TEXT,
+      bot_a_time_ms INTEGER,
+      bot_a_score REAL,
+      bot_b_response TEXT,
+      bot_b_time_ms INTEGER,
+      bot_b_score REAL,
+      winner_id TEXT REFERENCES bots(id),
+      narration TEXT,
+      created_at TEXT NOT NULL
+    );
+  `)
+
+  // Column migrations for existing databases
+  const migrations = [
+    "ALTER TABLE bots ADD COLUMN archetype TEXT NOT NULL DEFAULT 'standard'",
+    "ALTER TABLE bots ADD COLUMN profile_pic_url TEXT",
+    "ALTER TABLE bots ADD COLUMN last_fight_at TEXT",
+    "ALTER TABLE bots ADD COLUMN consecutive_errors INTEGER NOT NULL DEFAULT 0",
+    "ALTER TABLE bots ADD COLUMN last_error_at TEXT",
+    "ALTER TABLE bots ADD COLUMN customization TEXT",
+  ]
+
+  for (const sql of migrations) {
+    try { sqlite.exec(sql) } catch { /* column already exists */ }
+  }
+
+  console.log('[botfights] database migrated')
+}