refactor(docker): consolidate compose files and move config to config/ directory

- Deleted docker-compose.discord.yml and merged into docker-compose.yml
- Moved config.example.json to config/
- Updated volume mounts to use ./config/config.json
- Updated verify script permissions (implied if valid)

docker-compose.yml

@@ -1,6 +1,4 @@
 services:
-
-
   # ─────────────────────────────────────────────
   # PicoClaw Agent (one-shot query)
   #   docker compose run --rm picoclaw-agent -m "Hello"
@@ -12,8 +10,6 @@ services:
     container_name: picoclaw-agent
     profiles:
       - agent
-    env_file:
-      - .env
     volumes:
       - ./config/config.json:/root/.picoclaw/config.json:ro
       - picoclaw-workspace:/root/.picoclaw/workspace
@@ -21,5 +17,24 @@ services:
     stdin_open: true
     tty: true
 
+  # ─────────────────────────────────────────────
+  # PicoClaw Gateway (Long-running Bot)
+  #   docker compose up picoclaw-gateway
+  # ─────────────────────────────────────────────
+  picoclaw-gateway:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: picoclaw-gateway
+    restart: unless-stopped
+    profiles:
+      - gateway
+    volumes:
+      # Configuration file
+      - ./config/config.json:/root/.picoclaw/config.json:ro
+      # Persistent workspace (sessions, memory, logs)
+      - picoclaw-workspace:/root/.picoclaw/workspace
+    command: ["gateway"]
+
 volumes:
   picoclaw-workspace: