Add missing files for Docker image

[ci skip]

Author: botder

utils/docker/sources.list

@@ -0,0 +1,20 @@
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal main restricted
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal-updates main restricted
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal universe
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal-updates universe
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal multiverse
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal-updates multiverse
+deb [arch=amd64,i386] http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
+deb [arch=amd64,i386] http://security.ubuntu.com/ubuntu/ focal-security main restricted
+deb [arch=amd64,i386] http://security.ubuntu.com/ubuntu/ focal-security universe
+deb [arch=amd64,i386] http://security.ubuntu.com/ubuntu/ focal-security multiverse
+
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal main restricted
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal-updates main restricted
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal universe
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal-updates universe
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal multiverse
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal-updates multiverse
+deb [arch=armhf,arm64] http://ports.ubuntu.com/ focal-backports main restricted universe multiverse
+
+deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu focal main

utils/docker/ubuntu-toolchain-r-ubuntu-test.asc

@@ -0,0 +1,31 @@
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+Comment: Hostname: 
+Version: Hockeypuck 2.2
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