feat: add Dockerfile and GitLab CI pipeline for Harbor

Multi-stage Docker build: node:20-alpine + nginx:1.27-alpine.
CI builds and pushes to harbor-in-k3s.cheverjohn.me/iloom/iloom-frontend.

Co-Authored-By: Claude <noreply@anthropic.com>

.gitlab-ci.yml

@@ -0,0 +1,27 @@
+stages:
+  - build
+
+variables:
+  HARBOR_REGISTRY: harbor-in-k3s.cheverjohn.me
+  HARBOR_PROJECT: iloom
+  DOCKER_TLS_CERTDIR: "/certs"
+
+build-frontend:
+  stage: build
+  image: docker:27
+  services:
+    - docker:27-dind
+  before_script:
+    - echo "$HARBOR_PASSWORD" | docker login $HARBOR_REGISTRY -u "$HARBOR_USER" --password-stdin
+  script:
+    - |
+      if [ -n "$CI_COMMIT_TAG" ]; then
+        TAG="$CI_COMMIT_TAG"
+      else
+        TAG="main-${CI_COMMIT_SHORT_SHA}"
+      fi
+    - docker build -t $HARBOR_REGISTRY/$HARBOR_PROJECT/iloom-frontend:$TAG .
+    - docker push $HARBOR_REGISTRY/$HARBOR_PROJECT/iloom-frontend:$TAG
+  rules:
+    - if: $CI_COMMIT_BRANCH == "main"
+    - if: $CI_COMMIT_TAG =~ /^v/

Dockerfile

@@ -0,0 +1,11 @@
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM nginx:1.27-alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+EXPOSE 3015
+CMD ["nginx", "-g", "daemon off;"]