Initial commit: SDI SaaS Platform foundation

- Complete monorepo structure with pnpm workspaces
- Prisma database schema with 20+ entities
- NestJS API with 9 core modules
- BullMQ orchestration worker
- AWS and Azure provider adapters
- Docker Compose infrastructure
- Complete documentation

apps/api/Dockerfile

@@ -0,0 +1,26 @@
+FROM node:20-alpine AS base
+RUN npm install -g pnpm@8.15.0
+
+FROM base AS dependencies
+WORKDIR /app
+COPY package.json pnpm-workspace.yaml pnpm-lock.yaml* ./
+COPY apps/api/package.json ./apps/api/
+COPY packages/database/package.json ./packages/database/
+COPY packages/shared-types/package.json ./packages/shared-types/
+RUN pnpm install --frozen-lockfile
+
+FROM base AS build
+WORKDIR /app
+COPY --from=dependencies /app/node_modules ./node_modules
+COPY . .
+RUN pnpm --filter @sdi/database db:generate
+RUN pnpm --filter @sdi/api build
+
+FROM base AS runtime
+WORKDIR /app
+COPY --from=dependencies /app/node_modules ./node_modules
+COPY --from=build /app/apps/api/dist ./apps/api/dist
+COPY --from=build /app/packages ./packages
+COPY apps/api/package.json ./apps/api/
+EXPOSE 3000
+CMD ["node", "apps/api/dist/main.js"]