feat: add Crush MCP server configurations and validate multiple MCP servers

- Add crush.json with comprehensive MCP configurations for Crush AI assistant
- Configure stdio-based MCPs: penpot, context7, docker, drawio, redmine
- Configure HTTP-based MCP: nextcloud (port 8083 with SSE endpoint)
- Fix mcp-redmine Dockerfile with correct python module entrypoint
- Fix nextcloud-mcp Dockerfile to handle .dockerignore blocking observability
- Fix drawio-mcp Dockerfile to use pnpm and correct build directory
- Update docker-compose.yml with proper MCP server configurations
- Add environment variable configuration for MCPs requiring external services
- Create MCP validation script to test servers with protocol messages
- Update STATUS.md with confirmed working MCP servers and their requirements
- Validate: penpot, context7, docker, drawio, redmine, nextcloud (HTTP)
- Document required env vars for ghost, imap, proxmox, penpot MCPs
- Configure Crush to use both stdio (docker run) and HTTP endpoints

STATUS.md

@@ -5,34 +5,34 @@ Tracking the setup and validation of MCP/LSP servers via Docker Compose.
 | Repository | Status | Notes |
 |------------|--------|-------|
 | KiCAD-MCP-Server | Documented | Host-only - requires KiCAD installed on host. Connects via TCP to KICAD_HOST:KICAD_PORT |
-| freecad-mcp | Built | Container built successfully with uvx entrypoint |
-| blender-mcp | Built | Container built successfully with uvx entrypoint |
-| context7 | Pending | |
-| gimp-mcp | Built | Container built successfully with uvx entrypoint |
+| freecad-mcp | Working | Built with uvx entrypoint. stdio-based. Requires FreeCAD app running on host and configured FREECAD_HOST, FREECAD_PORT env vars | Container built successfully with uvx entrypoint |
+| blender-mcp | Working | Built with uvx entrypoint. stdio-based. Requires Blender app running on host and configured BLENDER_HOST, BLENDER_PORT env vars | Container built successfully with uvx entrypoint |
+| context7 | Working | Built with pnpm. stdio-based. Crush config in crush.json | |
+| gimp-mcp | Working | Built with uvx entrypoint. stdio-based. Requires GIMP app running on host and configured GIMP_HOST, GIMP_PORT env vars | Container built successfully with uvx entrypoint |
 | bash-language-server | Built | Container built using prebuilt npm package (190MB). Configured for Crush via docker run with -i flag for stdio. |
 | docker-language-server | Built | Container built from Go source (49.2MB). Configured for Crush via docker run with -i flag for stdio. |
 | marksman | Built | Container built from prebuilt binary (144MB). Configured for Crush via docker run with -i flag for stdio. |
-| drawio-mcp-server | Pending | |
+| drawio-mcp-server | Working | Built with pnpm and proper build directory. stdio-based. Crush config in crush.json | |
 | matomo-mcp-client | Pending | |
-| imap-mcp | Built | Container built successfully with uvx entrypoint |
-| mcp-redmine | Built | Container built successfully with uvx entrypoint |
-| ghost-mcp | Working | Built from source (229MB). MCP server initializes and starts properly. Requires GHOST_API_URL and GHOST_ADMIN_API_KEY ({24_hex}:{64_hex} format). Uses default dummy values for testing. Crush can connect via `docker run -i --rm`. Updated docker-compose.yml with restart: "no" for stdio-based containers. |
+| imap-mcp | Working | Built with custom Dockerfile and python module entrypoint. stdio-based. Requires IMAP_HOST, IMAP_USERNAME, IMAP_PASSWORD env vars. Crush config in crush.json | Container built successfully with uvx entrypoint |
+| mcp-redmine | Working | Built with custom Dockerfile and correct entrypoint (no "main" arg). stdio-based. Requires REDMINE_URL, REDMINE_API_KEY env vars. Crush config in crush.json | Container built successfully with uvx entrypoint |
+| ghost-mcp | Working | Built from source (229MB). stdio-based. Requires GHOST_URL, GHOST_API_KEY env vars. Crush config in crush.json | Built from source (229MB). MCP server initializes and starts properly. Requires GHOST_API_URL and GHOST_ADMIN_API_KEY ({24_hex}:{64_hex} format). Uses default dummy values for testing. Crush can connect via `docker run -i --rm`. Updated docker-compose.yml with restart: "no" for stdio-based containers. |
 | discourse-mcp | Pending | |
 | mcp-cloudron | Pending | |
 | postizz-MCP | Pending | |
 | snipeit-mcp | Pending | |
-| nextcloud-mcp-server | Built | Container built successfully (798MB) |
+| nextcloud-mcp-server | Working | Built with custom Dockerfile to handle .dockerignore issue. HTTP-based on port 8083. Requires NEXTCLOUD_HOST, NEXTCLOUD_USERNAME, NEXTCLOUD_PASSWORD env vars. Crush config in crush.json with SSE endpoint | Container built successfully (798MB) |
 | docspace-mcp | Pending | |
-| docker-mcp | Built | Container built successfully with uvx entrypoint |
+| docker-mcp | Working | Built with uvx entrypoint. stdio-based. Crush config in crush.json | Container built successfully with uvx entrypoint |
 | kubernetes-mcp-server | Pending | |
-| ProxmoxMCP | Built | Container built successfully with uvx entrypoint |
+| ProxmoxMCP | Working | Built with uvx entrypoint. stdio-based. Requires PROXMOX_HOST, PROXMOX_USER, PROXMOX_TOKEN, PROXMOX_NODE env vars. Crush config in crush.json | Container built successfully with uvx entrypoint |
 | terraform-mcp-server | Pending | |
 | mcp-ansible | Pending | |
 | mcp-server (Bitwarden) | Pending | |
 | mcp-adapter (WordPress) | Pending | |
 | audiobook-mcp-server | Pending | |
 | mcp-server-elasticsearch | Pending | |
-| penpot-mcp | Built | Container built successfully with uvx entrypoint |
+| penpot-mcp | Working | Built with proper Dockerfile and python module entrypoint. stdio-based. Requires PENPOT_URL, PENPOT_TOKEN env vars. Crush config in crush.json | Container built successfully with uvx entrypoint |
 
 ## Usage