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Update README.md
Added note to install netcat before calling wait-for to avoid time out messages.
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@ -49,3 +49,12 @@ Ironically testing is done using [bats](https://github.com/sstephenson/bats), wh
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docker build -t wait-for .
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docker run -t wait-for
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## Note
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Make sure netcat is installed in your Dockerfile before running the command.
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```
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RUN apt-get -q update && apt-get -qy install netcat
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```
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https://stackoverflow.com/questions/44663180/docker-why-does-wait-for-always-time-out
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