Docker build images error
Dear sir,
I got a problem when I use docker build,
win10 docker 4.3.0 (71786)
##PS D:\Docker\elsa> docker build --no-cache -t charade/xlibbox:elsa .
=> ERROR [2/7] RUN apt-get update 36.4s
[2/7] RUN apt-get update:
#63.152 Get:1 http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease [3607 B]
#63.217 Err:1 http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease
#63.217 The following signatures were invalid: EXPKEYSIG 51716619E084DAB9 Michael Rutter marutter@gmail.com
#63.978 Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
#64.015 Hit:4 http://archive.ubuntu.com/ubuntu bionic InRelease
#64.300 Get:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
#64.895 Get:6 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [1444 kB]
#65.235 Get:7 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
#65.833 Get:8 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [2225 kB]
#67.168 Get:2 https://packagecloud.io/github/git-lfs/ubuntu bionic InRelease [24.4 kB]
#68.188 Get:9 https://packagecloud.io/github/git-lfs/ubuntu bionic/main amd64 Packages [5176 B]
#610.53 Get:10 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [2461 kB]
#617.44 Get:11 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [2898 kB]
#620.33 Get:12 http://security.ubuntu.com/ubuntu bionic-security/restricted amd64 Packages [691 kB]
#622.91 Get:13 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 Packages [26.8 kB]
#631.11 Get:14 http://archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 Packages [34.4 kB]
#631.68 Get:15 http://archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [725 kB]
#635.14 Get:16 http://archive.ubuntu.com/ubuntu bionic-backports/main amd64 Packages [11.3 kB]
#635.43 Get:17 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 Packages [11.4 kB]
#635.48 Reading package lists...
#636.37 W: GPG error: http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease: The following signatures were invalid: EXPKEYSIG 51716619E084DAB9 Michael Rutter marutter@gmail.com
#636.37 E: The repository 'http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease' is not signed.
executor failed running [/bin/sh -c apt-get update]: exit code: 100
Has anyone figured this one out? Same error on my end.