Update cheatsheets

docker-slim

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# docker-slim
+
+> Analyze and optimize Docker images.
+> More information: <https://github.com/docker-slim/docker-slim>.
+
+- Start DockerSlim on interactive mode:
+
+`docker-slim`
+
+- Analyze Docker layers from a specific image:
+
+`docker-slim xray --target {{image:tag}}`
+
+- Lint a Dockerfile:
+
+`docker-slim lint --target {{path/to/Dockerfile}}`
+
+- Analyze and generate an optimized Docker image:
+
+`docker-slim build {{image:tag}}`
+
+- Display help for a subcommand:
+
+`docker-slim {{subcommand}} --help`