Initial import

infra/docker/README.md

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+# infra/docker
+
+Docker build definitions for the single-VPS Compose topology.
+
+## Implemented in this iteration
+- Workspace-aware Node 22 images for `web`, `worker`, and `bot`
+- Dedicated `migrate` image for schema bootstrap
+- `corepack` + `pnpm` based install flow inside containers
+- TypeScript build step for each runtime before container startup
+
+## Current limitations
+- No production pruning yet
+- No `cli` image yet