Update with upstream changes

Author: jeanp413

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        arch: [bionic-x64, stretch-arm64, stretch-armhf, centos7-devtoolset8-x64]
+        arch: [bionic-x64, buster-arm64, buster-armhf, centos7-devtoolset8-x64]
 
     steps:
       - uses: actions/checkout@v2
@@ -36,4 +36,4 @@ jobs:
           context: ${{ matrix.arch }}
           file: ${{ matrix.arch }}/Dockerfile
           tags: gitpod/openvscode-server-linux-build-agent:${{ matrix.arch }}
-          push: ${{ github.ref == 'refs/heads/main' }}
+          push: ${{ github.ref == 'refs/heads/main' }}

bionic-x64/Dockerfile

@@ -1,4 +1,4 @@
-ARG REPO=mcr.microsoft.com/mirror/docker/library/ubuntu
+ARG REPO=ubuntu
 ARG TAG=18.04
 FROM ${REPO}:${TAG}
 

centos7-devtoolset8-x64/Dockerfile

@@ -1,4 +1,4 @@
-ARG REPO=mcr.microsoft.com/mirror/docker/library/centos
+ARG REPO=centos
 ARG TAG=7
 FROM ${REPO}:${TAG}
 
@@ -28,4 +28,4 @@ RUN npm install -g yarn
 ENV PATH=/opt/rh/devtoolset-8/root/usr/bin/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 
 RUN mkdir -p /root/vscode
-WORKDIR /root/vscode
+WORKDIR /root/vscode