Remove obsolete scripts and configuration files for self-hosting and database migrations

- Deleted `pnpm-workspace.yaml` as it is no longer needed.
- Removed `apply-migrations.sh` script that handled database migrations.
- Eliminated `generate-full-stack-env.mjs` script for environment variable generation.
- Deleted `selfhost-backup.sh` script for creating backups of the self-hosted environment.
- Removed `selfhost-doctor.sh` script for health checks of the self-hosted services.
- Deleted `selfhost-restore.sh` script for restoring backups in the self-hosted environment.

Dockerfile

@@ -1,63 +0,0 @@
-# ── Production Dockerfile (Dokploy / Coolify ready) ──────────────
-FROM node:22-alpine AS base
-
-# ── 1. Install dependencies ─────────────────────────────────────
-FROM base AS deps
-RUN apk add --no-cache libc6-compat
-WORKDIR /app
-
-RUN corepack enable pnpm
-
-COPY package.json pnpm-lock.yaml* pnpm-workspace.yaml* ./
-RUN pnpm i --frozen-lockfile
-
-# ── 2. Build ─────────────────────────────────────────────────────
-FROM base AS builder
-WORKDIR /app
-RUN corepack enable pnpm
-
-COPY --from=deps /app/node_modules ./node_modules
-COPY . .
-
-# Next.js inlines NEXT_PUBLIC_* at build time.
-# Dokploy / Coolify inject these as build-args automatically.
-ARG NEXT_PUBLIC_SUPABASE_URL
-ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
-ARG NEXT_PUBLIC_SITE_URL
-ENV NEXT_PUBLIC_SUPABASE_URL=$NEXT_PUBLIC_SUPABASE_URL
-ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=$NEXT_PUBLIC_SUPABASE_ANON_KEY
-ENV NEXT_PUBLIC_SITE_URL=$NEXT_PUBLIC_SITE_URL
-ENV NEXT_TELEMETRY_DISABLED=1
-
-RUN pnpm build
-
-# ── 3. Production runner ─────────────────────────────────────────
-FROM base AS runner
-WORKDIR /app
-
-ENV NODE_ENV=production
-ENV NEXT_TELEMETRY_DISABLED=1
-
-RUN addgroup --system --gid 1001 nodejs
-RUN adduser --system --uid 1001 nextjs
-
-# Copy public assets
-COPY --from=builder /app/public ./public
-
-# Copy standalone output (Next.js output: "standalone")
-COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
-
-USER nextjs
-
-EXPOSE 3000
-ENV PORT=3000
-ENV HOSTNAME="0.0.0.0"
-
-# Health check for Dokploy / Coolify / Docker orchestrators
-HEALTHCHECK --interval=30s --timeout=10s --start-period=15s --retries=3 \
-  CMD wget -qO- http://127.0.0.1:3000/api/health || exit 1
-
-# Runtime env vars (Supabase keys, AI keys etc.) are injected by
-# Dokploy / Coolify as environment variables — no .env file needed.
-CMD ["node", "server.js"]