Docker build images error

[辉 符]

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:
#6 3.152 Get:1 http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease [3607 B]
#6 3.217 Err:1 http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease
#6 3.217 The following signatures were invalid: EXPKEYSIG 51716619E084DAB9 Michael Rutter [e-mail]
#6 3.978 Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
#6 4.015 Hit:4 http://archive.ubuntu.com/ubuntu bionic InRelease
#6 4.300 Get:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
#6 4.895 Get:6 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [1444 kB]
#6 5.235 Get:7 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
#6 5.833 Get:8 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [2225 kB]
#6 7.168 Get:2 https://packagecloud.io/github/git-lfs/ubuntu bionic InRelease [24.4 kB]
#6 8.188 Get:9 https://packagecloud.io/github/git-lfs/ubuntu bionic/main amd64 Packages [5176 B]
#6 10.53 Get:10 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [2461 kB]
#6 17.44 Get:11 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [2898 kB]
#6 20.33 Get:12 http://security.ubuntu.com/ubuntu bionic-security/restricted amd64 Packages [691 kB]
#6 22.91 Get:13 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 Packages [26.8 kB]
#6 31.11 Get:14 http://archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 Packages [34.4 kB]
#6 31.68 Get:15 http://archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [725 kB]
#6 35.14 Get:16 http://archive.ubuntu.com/ubuntu bionic-backports/main amd64 Packages [11.3 kB]
#6 35.43 Get:17 http://archive.ubuntu.com/ubuntu bionic-backports/universe amd64 Packages [11.4 kB]
#6 35.48 Reading package lists...
#6 36.37 W: GPG error: http://cran.rstudio.com/bin/linux/ubuntu xenial/ InRelease: The following signatures were invalid: EXPKEYSIG 51716619E084DAB9 Michael Rutter [e-mail]
#6 36.37 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

‌

[Joy Buongiorno]

Has anyone figured this one out? Same error on my end.