Add production deployment: Dockerfile, docker-compose, deploy script

- Dockerfile: multi-stage build (golang:1.25-alpine → alpine:3.21), linux/amd64
- infra/mariadb: docker-compose + init SQL for reanimator DB/user
- infra/reanimator: docker-compose for reanimator-api (Gitea registry)
- deploy.sh: local build → push to git.mchus.pro → SSH deploy

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

deploy.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+IMAGE="git.mchus.pro/reanimator/core"
+TAG="${1:-latest}"
+DEPLOY_DIR="/appdata/reanimator"
+
+echo "Deploy target:"
+echo "  1) local"
+echo "  2) remote (SSH)"
+read -rp "Choice [1/2]: " choice
+
+case "$choice" in
+  1)
+    TARGET="local"
+    ;;
+  2)
+    read -rp "SSH target (login@hostname): " SSH_TARGET
+    TARGET="ssh"
+    ;;
+  *)
+    echo "Invalid choice" >&2
+    exit 1
+    ;;
+esac
+
+echo "==> Building and pushing $IMAGE:$TAG (linux/amd64)..."
+docker buildx build --platform linux/amd64 -t "$IMAGE:$TAG" --push .
+
+if [ "$TARGET" = "local" ]; then
+  echo "==> Deploying locally..."
+  docker pull "$IMAGE:$TAG"
+  cd "$DEPLOY_DIR"
+  docker compose pull
+  docker compose up -d --remove-orphans
+  echo "-- Status:"
+  docker compose ps
+  echo "==> Done."
+else
+  echo "==> Deploying on $SSH_TARGET..."
+  ssh "$SSH_TARGET" "
+    set -euo pipefail
+    echo '-- Pulling image...'
+    docker pull $IMAGE:$TAG
+
+    echo '-- Restarting container...'
+    cd $DEPLOY_DIR
+    docker compose pull
+    docker compose up -d --remove-orphans
+
+    echo '-- Status:'
+    docker compose ps
+  "
+  echo "==> Done."
+fi