**Motivations:**
- Fix 401 error on anchorage API due to .env not being loaded correctly
- Fix 502 error on dashboard due to service not running
- Add backup script for mining keys and wallet descriptors
- Improve service management with startup scripts and systemd services
**Root causes:**
- dotenv.config() was called without explicit path, causing .env to be loaded from wrong directory
- Services were not started automatically, causing 502 errors
- No backup mechanism for critical keys and wallet data
**Correctifs:**
- Improved .env loading in api-anchorage/src/server.js with explicit path
- Improved .env loading in signet-dashboard/src/server.js with explicit path
- Added backups/ directory to .gitignore to prevent committing sensitive data
- Created export-backup.sh script for backing up mining keys and wallet descriptors
**Evolutions:**
- Added api-anchorage/start.sh script for proper service startup
- Added api-anchorage/anchorage-api.service systemd service file
- Added fixKnowledge/api-anchorage-401-error.md documentation
- Added fixKnowledge/dashboard-502-error.md documentation
- Updated mempool submodule
**Pages affectées:**
- .gitignore (added backups/)
- api-anchorage/src/server.js (improved .env loading)
- api-anchorage/start.sh (new)
- api-anchorage/anchorage-api.service (new)
- signet-dashboard/src/server.js (improved .env loading)
- export-backup.sh (new)
- fixKnowledge/api-anchorage-401-error.md (new)
- fixKnowledge/dashboard-502-error.md (new)
- mempool (submodule updated)
dde1ccbb07