Update skills: add website-creator, mql-developer, ecommerce-astro

Changes:
- Add FAL_KEY and GEMINI_API_KEY to .env.example
- Update picture-it to use ~/.config/opencode/.env (unified creds)
- Remove shodh-memory skill (no longer used)
- Remove alphaear-* skills (deprecated)
- Remove thai-frontend-dev skill (replaced by website-creator)
- Remove theme-factory skill
- Add mql-developer skill (MQL5 trading)
- Add ecommerce-astro skill (Astro e-commerce)
- Add website-creator skill (Next.js + Payload CMS)
- Update install script for new skills

skills/website-creator/templates/nextjs-payload-starter/Dockerfile

@@ -0,0 +1,39 @@
+# Multi-stage Dockerfile for Next.js + Payload CMS with PostgreSQL
+# Requires `output: 'standalone'` in next.config.ts
+
+FROM node:22-alpine AS deps
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+
+COPY package.json pnpm-lock.yaml* ./
+RUN corepack enable && corepack prepare pnpm@9.0.0 --activate && pnpm install --frozen-lockfile
+
+FROM deps AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+RUN pnpm build
+
+FROM node:22-alpine AS runner
+WORKDIR /app
+
+ENV NODE_ENV production
+
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+RUN mkdir .next
+RUN chown nextjs:nodejs .next
+
+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/public ./public
+
+USER nextjs
+
+EXPOSE 3000
+ENV PORT 3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]