$ docker build . -t build-env:latest
Sending build context to Docker daemon 2.048kB
Step 1/3 : FROM ubuntu:20.04
---> 53df61775e88
Step 2/3 : RUN dpkg --add-architecture i386
---> Running in 7f8e1780ec23
Removing intermediate container 7f8e1780ec23
---> 04f0bfad221d
Step 3/3 : RUN apt-get update -y
---> Running in b091ec263075
Get:1 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal InRelease [265 kB]
Get:3 http://security.ubuntu.com/ubuntu focal-security/multiverse i386 Packages [8159 B]
Get:4 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Get:5 http://security.ubuntu.com/ubuntu focal-security/main i386 Packages [559 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Get:7 http://security.ubuntu.com/ubuntu focal-security/universe amd64 Packages [879 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages [11.3 MB]
Get:9 http://security.ubuntu.com/ubuntu focal-security/restricted i386 Packages [28.0 kB]
Get:10 http://security.ubuntu.com/ubuntu focal-security/restricted amd64 Packages [1286 kB]
Get:11 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages [1930 kB]
Get:12 http://security.ubuntu.com/ubuntu focal-security/universe i386 Packages [683 kB]
Get:13 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 Packages [27.5 kB]
Get:14 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages [1275 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal/restricted i386 Packages [10.1 kB]
Get:16 http://archive.ubuntu.com/ubuntu focal/multiverse i386 Packages [88.9 kB]
Get:17 http://archive.ubuntu.com/ubuntu focal/restricted amd64 Packages [33.4 kB]
Get:18 http://archive.ubuntu.com/ubuntu focal/main i386 Packages [930 kB]
Get:19 http://archive.ubuntu.com/ubuntu focal/universe i386 Packages [5999 kB]
Get:20 http://archive.ubuntu.com/ubuntu focal/multiverse amd64 Packages [177 kB]
Get:21 http://archive.ubuntu.com/ubuntu focal-updates/restricted amd64 Packages [1365 kB]
Get:22 http://archive.ubuntu.com/ubuntu focal-updates/restricted i386 Packages [29.6 kB]
Get:23 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages [2363 kB]
Get:24 http://archive.ubuntu.com/ubuntu focal-updates/universe i386 Packages [845 kB]
Get:25 http://archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 Packages [30.2 kB]
Get:26 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages [1166 kB]
Get:27 http://archive.ubuntu.com/ubuntu focal-updates/main i386 Packages [836 kB]
Get:28 http://archive.ubuntu.com/ubuntu focal-updates/multiverse i386 Packages [9584 B]
Get:29 http://archive.ubuntu.com/ubuntu focal-backports/universe amd64 Packages [27.1 kB]
Get:30 http://archive.ubuntu.com/ubuntu focal-backports/main amd64 Packages [53.8 kB]
Get:31 http://archive.ubuntu.com/ubuntu focal-backports/universe i386 Packages [14.8 kB]
Get:32 http://archive.ubuntu.com/ubuntu focal-backports/main i386 Packages [42.4 kB]
Fetched 32.6 MB in 6s (5428 kB/s)
Reading package lists...
Removing intermediate container b091ec263075
---> b064d66d76da
Successfully built b064d66d76da
Successfully tagged build-env:latest