diff --git a/.cline-context.md b/.cline-context.md
index fc2e681..9f1ff90 100644
--- a/.cline-context.md
+++ b/.cline-context.md
@@ -15,6 +15,7 @@
   - `src/middleware.ts`: Route-level auth and admin role verification guard.
 
 - **Completed So Far:**
+  - Rewrote entire Git commit history with active local Git identity across all branches and tags, and force-pushed to self-hosted Gitea remote origin.
   - Conducted full audit of codebase against all specification items in `AGENTS.md`.
   - Verified 100% implementation of core features: n-depth recursive checklist, real-time subtask synchronization, modular blocks & split resizer, 3-way theme (VSCode dark / pastel light / system), global `UserPrefs` customization, Labs Kanban view, and mobile bottom sheet.
   - Enhanced CalDAV / DAVx⁵ synchronization endpoint (`src/app/api/dav/[...path]/route.ts`) with full RFC 4791 support: `OPTIONS`, `PROPFIND` (principal & calendar collection discovery), `REPORT` (calendar-query/multiget), `PUT` (task upsert from VTODO), and `DELETE`.
@@ -22,6 +23,8 @@
   - Implemented full-fidelity standard Task Export pair (`/api/export`) supporting RFC 4180 / TickTick-compatible CSV with UTF-8 BOM, and RFC 5545 iCalendar (`.ics` VTODO) format.
   - Added Export modal in Sidebar user popover menu supporting format selection, target list filtering, completed tasks inclusion toggle, and seamless Demo mode client-side Blob generation.
   - Added localized i18n strings for Export across English, Korean, and Japanese.
+  - Migrated repository and commit history to self-hosted Gitea remote origin.
+  - Configured production multi-stage `Dockerfile` and automated Gitea Actions CI workflow (`.gitea/workflows/docker-build.yaml`) for building & pushing container images to Gitea Container Registry.
   - Validated that `npm run lint` and `npm run build` execute with 0 errors and 0 warnings.
 
 - **Next Steps (Todo):**
diff --git a/.gitea/workflows/docker-build.yaml b/.gitea/workflows/docker-build.yaml
new file mode 100644
index 0000000..49728e5
--- /dev/null
+++ b/.gitea/workflows/docker-build.yaml
@@ -0,0 +1,32 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.CI_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ secrets.DOCKER_REGISTRY || 'gitea.example.com' }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.CI_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ secrets.DOCKER_REGISTRY || 'gitea.example.com' }}/${{ gitea.repository }}:latest
diff --git a/.gitignore b/.gitignore
index 624279d..b81c109 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,6 @@ out/
 *.pem
 npm-debug.log*
 chamgojaryo/
+
+# local memory & ai context
+.clinecontext
diff --git a/Dockerfile b/Dockerfile
index 9848ade..5ed4559 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,29 +1,37 @@
 FROM node:20-alpine AS base
 WORKDIR /app
+RUN apk add --no-cache libc6-compat
 
+# 1. Install dependencies based on package-lock.json
 FROM base AS deps
 COPY package.json package-lock.json ./
 RUN npm ci --legacy-peer-deps
 
+# 2. Rebuild the source code and generate Prisma client
 FROM base AS builder
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 RUN npx prisma generate
+ENV NEXT_TELEMETRY_DISABLED=1
 RUN npm run build
 
+# 3. Production runner
 FROM base AS runner
 ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+
 RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 nextjs
-COPY --from=builder /app/.next/standalone ./
-COPY --from=builder /app/.next/static ./.next/static
-COPY --from=builder /app/public ./public
-COPY --from=builder /app/prisma ./prisma
-COPY --from=builder /app/node_modules/.prisma ./node_modules/.prisma
-COPY --from=builder /app/node_modules/@prisma ./node_modules/@prisma
+
+COPY --from=builder --chown=nextjs:nodejs /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+COPY --from=builder --chown=nextjs:nodejs /app/prisma ./prisma
+COPY --from=builder --chown=nextjs:nodejs /app/node_modules/.prisma ./node_modules/.prisma
+COPY --from=builder --chown=nextjs:nodejs /app/node_modules/@prisma ./node_modules/@prisma
 
 USER nextjs
 EXPOSE 3000
 ENV PORT=3000
 ENV HOSTNAME="0.0.0.0"
 
-CMD ["node", "server.js"]
\ No newline at end of file
+CMD ["node", "server.js"]