Update sample docker-compose.yml in DOCKER_HUB.md

The sample was missing volumes and env vars added since the original:
shell-history, zoxide, nvim-data, palace, chroma-cache, and the
GitHub/Gitea token forwarding env vars. Now matches the actual
docker-compose.yml shipped in the repo.

DOCKER_HUB.md

@@ -417,12 +417,22 @@ services:
       - .env
     environment:
       - TERM=xterm-256color
+      - GITHUB_PERSONAL_ACCESS_TOKEN=${GITHUB_PERSONAL_ACCESS_TOKEN:-}
+      - GITEA_ACCESS_TOKEN=${GITEA_ACCESS_TOKEN:-}
+      - GITEA_HOST=${GITEA_HOST:-}
     volumes:
       - ~/projects:/workspace
       - ~/.ssh:/home/developer/.ssh:ro
       - devbox-data:/home/developer/.local/share/opencode
       - devbox-state:/home/developer/.local/state/opencode
+      - devbox-shell-history:/home/developer/.cache/bash
+      - devbox-zoxide:/home/developer/.local/share/zoxide
+      - devbox-nvim-data:/home/developer/.local/share/nvim
       - devbox-uv:/home/developer/.local/share/uv
+      # Optional: persist MemPalace data (conversation memory, knowledge graph)
+      # - devbox-palace:/home/developer/.mempalace
+      # Optional: persist ChromaDB embedding model cache (~79 MB)
+      # - devbox-chroma-cache:/home/developer/.cache/chroma
       # Optional: persist Rust toolchains and cargo data
       # - devbox-rustup:/home/developer/.rustup
       # - devbox-cargo:/home/developer/.cargo
@@ -440,7 +450,12 @@ services:
 volumes:
   devbox-data:
   devbox-state:
+  devbox-shell-history:
+  devbox-zoxide:
+  devbox-nvim-data:
   devbox-uv:
+  # devbox-palace:
+  # devbox-chroma-cache:
   # devbox-rustup:
   # devbox-cargo:
   # devbox-vscode: