Add comprehensive documentation for CLICD features and operations

- Introduced Container Management documentation covering lifecycle operations, resource management, and console access.
- Added Dashboard documentation detailing metrics and related APIs.
- Created Host Report documentation summarizing host environment and resource status.
- Included Image Management documentation for template handling and management actions.
- Documented Networking and Routing features including NAT4 and IPv6 management.
- Added Security Alerts documentation outlining alert scenarios and API usage.
- Created Snapshot Management documentation for snapshot operations and scheduling.
- Documented Sub-user management for granting access to specific containers.
- Added Configuration guide detailing runtime settings and security recommendations.
- Created Installation guide for setting up CLICD with requirements and steps.
- Added Introduction and Quick Start guides for new users.
- Documented Upgrade process with version checking and pre-upgrade checklist.
- Created Deployment guide for service exposure and firewall recommendations.
- Added FAQ section addressing common questions and concerns.
- Documented Troubleshooting steps for common issues encountered.

docs/en/developer/build.md

@@ -0,0 +1,42 @@
+# Local Build
+
+## Frontend Build
+
+```bash
+cd frontend
+npm install
+npm run build
+```
+
+Build output is written to `frontend/dist`.
+
+## Backend Build
+
+```bash
+cd backend
+go test ./...
+go build -o ../build/clicd .
+```
+
+To package the embedded web panel, sync the frontend build output into the backend embed directory first.
+
+## One-command Build
+
+The project root provides a build script:
+
+```bash
+bash build.sh
+```
+
+The script chains frontend build, static asset sync, and Go binary build.
+
+## Docs Build
+
+```bash
+cd docs
+npm install
+npm run dev
+npm run build
+```
+
+`npm run dev` starts a local preview, and `npm run build` generates static documentation.