refactor: rename deploy/ → docker/ (container build, not host deploy)

The folder only holds the in-container nginx + entrypoint that the
standalone Dockerfile copies. Calling it "deploy" implied host-level
production glue, which now lives in github.com/velxio/velxio-prod.
"docker/" makes the build-time vs deploy-time split obvious.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Dockerfile.standalone

@@ -129,13 +129,13 @@ COPY backend/scripts/ ./scripts/
 # ours as the default_server (was Issue #108: users behind reverse proxies got
 # the "Welcome to nginx" page because the stock site claimed default_server).
 RUN rm -f /etc/nginx/sites-enabled/default
-COPY deploy/nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
 
 # Copy built frontend assets from builder stage
 COPY --from=frontend-builder /app/frontend/dist /usr/share/nginx/html
 
 # Copy and configure entrypoint script (fix Windows CRLF → LF)
-COPY deploy/entrypoint.sh /app/entrypoint.sh
+COPY docker/entrypoint.sh /app/entrypoint.sh
 RUN sed -i 's/\r$//' /app/entrypoint.sh && chmod +x /app/entrypoint.sh
 
 # ── ESP32 emulation: pre-built QEMU .so + ROM binaries ──────────────────────

docs/wiki/docker-infrastructure.md

@@ -485,7 +485,7 @@ The Docker Hub description is automatically updated from the repository's `READM
 
 ## Entrypoint Script
 
-**Location:** `deploy/entrypoint.sh`
+**Location:** `docker/entrypoint.sh`
 
 The entrypoint script runs when the container starts. It initializes development tools and launches the application services.
 
@@ -551,7 +551,7 @@ Using `exec nginx` replaces the shell process with Nginx, making it PID 1. This
 
 ## Nginx Reverse Proxy
 
-**Location:** `deploy/nginx.conf`
+**Location:** `docker/nginx.conf`
 
 ### API Proxy Configuration
 
@@ -994,8 +994,8 @@ For ESP32 first-time compilation (cold build cache), this may still not be enoug
 | `Dockerfile.standalone` | Multi-stage Docker build (4 stages) |
 | `.github/workflows/docker-publish.yml` | CI/CD: builds + pushes multi-arch image |
 | `third-party/qemu-lcgamboa/.github/workflows/build-libqemu.yml` | CI/CD: builds QEMU .so for amd64 + arm64 |
-| `deploy/entrypoint.sh` | Container startup script |
-| `deploy/nginx.conf` | Nginx reverse proxy configuration |
+| `docker/entrypoint.sh` | Container startup script |
+| `docker/nginx.conf` | Nginx reverse proxy configuration |
 | `docker-compose.yml` | Self-hosting compose file (production at github.com/velxio/velxio-prod) |
 | `prebuilt/qemu/` | Local QEMU prebuilt files (optional, for dev) |
 | `backend/.env` | Backend environment variables (not committed) |