Clear apt cache to reduce image size

2018-07-30 16:14:32 -07:00
parent 2158329058
commit 102510ac0e
1 changed files with 4 additions and 1 deletions
--- a/ci/docker-rust-nightly/Dockerfile
+++ b/ci/docker-rust-nightly/Dockerfile
@@ -3,4 +3,7 @@ FROM rustlang/rust:nightly
 RUN cargo install --force clippy cargo-cov && \
    echo deb http://ftp.debian.org/debian stretch-backports main >> /etc/apt/sources.list && \
    apt update && \
-    apt install -y llvm-6.0
+    apt install -y \
+      llvm-6.0
+      && \
+    rm -rf /var/lib/apt/lists/*