Cleaning Up Dockerfile Layers Per Official Docs

From the official docs: 

```
Note: The official Debian and Ubuntu images automatically run apt-get clean, so explicit invocation is not required.
```

Also added ` && rm -rf /var/lib/apt/lists/*` as part of the install line which probably does what was intended (no need to make a new layer). 

Added apt-get update to the RUN payload, as it should be part of the same layer. 

Both are documented here: https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/
pull/1269/head
Ryan MacLean 8 years ago committed by GitHub
parent 26b51383b2
commit 7ce94eb468

@ -1,8 +1,7 @@
FROM debian:jessie
MAINTAINER Erik Dasque <erik@frenchguys.com>
RUN apt-get update
RUN apt-get install --no-install-recommends -y build-essential \
RUN apt-get update && apt-get install --no-install-recommends -y build-essential \
gcc \
unzip \
wget \
@ -15,10 +14,8 @@ RUN apt-get install --no-install-recommends -y build-essential \
gcc-arm-none-eabi \
binutils-arm-none-eabi \
libnewlib-arm-none-eabi \
git
RUN apt-get clean
RUN rm -rf /var/lib/apt/lists/*
git \
&& rm -rf /var/lib/apt/lists/*
ENV keyboard=ergodox
ENV subproject=ez

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