Add Docker Compose fleet config for agent containerization (closes #5)

- docker-compose.yml: Ollama, Gitea, Agent worker, Monitor services
- Dockerfile.agent: Hermes agent worker image with health endpoint
- .env.example: Environment variable template
- README.md: Setup instructions and service documentation

Services include health checks, persistent volumes, isolated network,
and proper dependency ordering.

docker-compose.yml

@@ -0,0 +1,137 @@
+---
+# docker-compose.yml
+# Fleet-ops Docker Compose configuration for the Timmy agent fleet.
+#
+# Services:
+#   - ollama:    Local LLM inference engine
+#   - gitea:     Forge service (issue tracking, git hosting)
+#   - agent:     Hermes agent worker loop
+#   - monitor:   Health check and monitoring service
+#
+# Usage:
+#   cp .env.example .env   # then edit .env with real values
+#   docker compose up -d
+#   docker compose logs -f agent
+
+services:
+  ollama:
+    image: ollama/ollama:latest
+    container_name: ollama
+    restart: unless-stopped
+    ports:
+      - "${OLLAMA_PORT:-11434}:11434"
+    volumes:
+      - ollama_data:/root/.ollama
+    networks:
+      - fleet
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:11434/api/tags"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 60s
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: all
+              capabilities: [gpu]
+
+  gitea:
+    image: gitea/gitea:latest
+    container_name: gitea
+    restart: unless-stopped
+    environment:
+      - USER_UID=${GITEA_UID:-1000}
+      - USER_GID=${GITEA_GID:-1000}
+      - GITEA__server__ROOT_URL=${GITEA_ROOT_URL:-http://gitea:3000}
+      - GITEA__server__DOMAIN=${GITEA_DOMAIN:-gitea}
+      - GITEA__server__SSH_PORT=${GITEA_SSH_PORT:-2222}
+      - GITEA__database__DB_TYPE=sqlite3
+    ports:
+      - "${GITEA_WEB_PORT:-3000}:3000"
+      - "${GITEA_SSH_PORT:-2222}:22"
+    volumes:
+      - gitea_data:/data
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+    networks:
+      - fleet
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3000/api/v1/version"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 30s
+
+  agent:
+    build:
+      context: .
+      dockerfile: Dockerfile.agent
+    container_name: agent-worker
+    restart: unless-stopped
+    env_file:
+      - .env
+    environment:
+      - OLLAMA_BASE_URL=http://ollama:11434
+      - GITEA_BASE_URL=http://gitea:3000
+      - AGENT_NAME=${AGENT_NAME:-hermes}
+      - AGENT_LOOP_INTERVAL=${AGENT_LOOP_INTERVAL:-30}
+      - LOG_LEVEL=${LOG_LEVEL:-info}
+    volumes:
+      - agent_data:/app/data
+    networks:
+      - fleet
+    depends_on:
+      ollama:
+        condition: service_healthy
+      gitea:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 15s
+
+  monitor:
+    image: curlimages/curl:latest
+    container_name: monitor
+    restart: unless-stopped
+    entrypoint: /bin/sh
+    command:
+      - -c
+      - |
+        while true; do
+          echo "[monitor] Checking services..."
+          for svc in ollama:11434/api/tags gitea:3000/api/v1/version agent:8080/health; do
+            host=$$(echo "$$svc" | cut -d: -f1)
+            url="http://$$svc"
+            if curl -sf "$$url" > /dev/null 2>&1; then
+              echo "[monitor] $$host: OK"
+            else
+              echo "[monitor] $$host: DOWN"
+            fi
+          done
+          sleep $${MONITOR_INTERVAL:-60}
+        done
+    networks:
+      - fleet
+    depends_on:
+      - ollama
+      - gitea
+      - agent
+
+volumes:
+  ollama_data:
+    driver: local
+  gitea_data:
+    driver: local
+  agent_data:
+    driver: local
+
+networks:
+  fleet:
+    driver: bridge
+    name: fleet-net