Refactor content structure and add basic authentication utilities

- Moved event and gallery data to JSON files for cleaner content management.
- Added session management utilities with CSRF protection.
- Integrated OAuth-based login and logout APIs.
- Updated dependencies, including Astro and introduced dotenv-cli.
- Enhanced package.json with local environment support.

Dockerfile

@@ -4,19 +4,17 @@ WORKDIR /app
 COPY package*.json ./
 RUN npm ci
 COPY . .
-# Ensure CSS variables are present
-RUN mkdir -p public/styles
-RUN cp -r styles/* public/styles/ || true
 RUN npm run build
 
 FROM node:20-alpine AS production
 
 WORKDIR /app
-RUN npm install -g serve
+ENV NODE_ENV=production
 COPY --from=build /app/dist ./dist
 
+# install minimal deps to run node if needed (alpine already has node)
 EXPOSE 3000
-CMD ["serve", "-s", "dist", "-l", "3000"]
+CMD ["node", "./dist/server/entry.mjs"]
 
-HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
   CMD wget -qO- http://localhost:3000/ || exit 1