Add GitHub Actions deployment workflow

- Add deployment workflow with test, build, and deploy jobs
- Add testing workflow for PRs
- Add deployment scripts (deploy, healthcheck, rollback)
- Add systemd service configuration
- Update Makefile with CI/CD targets
- Add comprehensive deployment documentation

config/systemd/cv.service

@@ -0,0 +1,45 @@
+[Unit]
+Description=CV Website Service
+After=network.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=txeo
+Group=txeo
+WorkingDirectory=/home/txeo/Git/yo/cv
+ExecStart=/home/txeo/Git/yo/cv/cv-server
+
+# Environment variables
+Environment="GO_ENV=production"
+Environment="PORT=1999"
+Environment="HOST=0.0.0.0"
+Environment="BASE_URL=https://juan.andres.morenorub.io"
+Environment="TEMPLATE_HOT_RELOAD=false"
+EnvironmentFile=-/home/txeo/Git/yo/cv/.env
+
+# Security hardening
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=false
+ReadWritePaths=/home/txeo/Git/yo/cv/data
+ReadOnlyPaths=/home/txeo/Git/yo/cv
+
+# Resource limits
+LimitNOFILE=65536
+MemoryMax=512M
+
+# Restart policy
+Restart=always
+RestartSec=5
+StartLimitInterval=60
+StartLimitBurst=3
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=cv
+
+[Install]
+WantedBy=multi-user.target