feat: add Dockerfiles for K3s deployment

Dockerfile.ssr for Astro SSR, Dockerfile.api for Fastify API.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,18 @@
+node_modules
+dist
+.git
+.gitignore
+.env
+.env.*
+*.md
+.vscode
+.idea
+.DS_Store
+.astro
+sanity
+k8s
+.gitea
+migrate-images.mjs
+seed-sanity.mjs
+seed-sanity-homepage.mjs
+clean-duplicates.mjs

Dockerfile.api

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+# Fastify API — no build step, runs server.mjs directly
+FROM node:22-alpine
+WORKDIR /app
+
+RUN corepack enable && corepack prepare pnpm@latest --activate
+
+COPY package.json pnpm-lock.yaml ./
+RUN pnpm install --frozen-lockfile --prod
+
+COPY server.mjs ./
+
+ENV NODE_ENV=production
+EXPOSE 3000
+
+CMD ["node", "server.mjs"]

Dockerfile.ssr

@@ -0,0 +1,25 @@
+# --- Stage 1: Build Astro SSR ---
+FROM node:22-alpine AS build
+WORKDIR /app
+
+RUN corepack enable && corepack prepare pnpm@latest --activate
+
+COPY package.json pnpm-lock.yaml ./
+RUN pnpm install --frozen-lockfile
+
+COPY . .
+RUN pnpm build
+
+# --- Stage 2: Runtime ---
+FROM node:22-alpine AS runtime
+WORKDIR /app
+
+COPY --from=build /app/dist ./dist
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/package.json ./
+
+ENV HOST=0.0.0.0
+ENV PORT=4321
+EXPOSE 4321
+
+CMD ["node", "dist/server/entry.mjs"]