Moving lotus PR 745 into a tools/dockers/ directory and adding some other examples

tools/dockers/README.md

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+## About 
+
+In [docker-examples/](docker-examples/) are community-contributed Docker and Docker Compose examples.

tools/dockers/docker-examples/README.md

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+## About 
+
+In this `docker-examples/` directory are community-contributed Docker and Docker Compose examples.
+
+#### Example Use Cases
+
+- **For a miner**
+   - basic storage miner (`miner-basic-`)
+   - distributed storage miner
+- **For API endpoints for building apps**
+   - local node for a developer (`api-local-`)
+   - hosted endpoint for apps / multiple developers (`api-hosted-`)
+- **For a local devnet or shared devnet**
+   - basic local devnet (also see [lotus docs on setting up a local devnet](https://lotu.sh/en+setup-local-dev-net))
+   - shared devnet
+  
+
+## Contributions
+
+- `miner-basic-busybox` - from @ldoublewood ([lotus PR 745](https://github.com/filecoin-project/lotus/pull/745))
+- `api-local-arch` - from @mateodelnorte
+- `api-hosted-debian-nginx` - from @RTradeLtd
+
+#### More examples:
+- [Issue 1143](https://github.com/filecoin-project/lotus/issues/1143)
+- [PR 1047](https://github.com/filecoin-project/lotus/pull/1047/files)
+
+## Contributing
+
+:whale: Have a new type of Docker to share?
+
+Make a PR with a new folder for it, describe its purpose and link to the repo or provide the Docker files. Add it to *Contributions* above.
+
+:beetle: See a bug? File an Issue so we can keep these up-to-date.

tools/dockers/docker-examples/api-hosted-debian-nginx/README.md

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+## Description
+
+- **For API endpoints for building apps**
+  - hosted endpoint for multiple developers
+
+Another container spins up a simple block explorer.
+
+## Repo
+
+https://github.com/RTradeLtd/lotus-infra

tools/dockers/docker-examples/api-local-arch/README.md

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+## Description
+
+- **For API endpoints for building apps**
+  - local node for a developer
+
+## Repo
+
+https://github.com/mateodelnorte/filecoin-lotus-docker

tools/dockers/docker-examples/basic-miner-busybox/README.md

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+## Description
+
+- **For a miner**
+  - basic storage miner