fix: Update build script

.gitea/workflows/build.yml

@@ -11,10 +11,13 @@ jobs:
         uses: actions/checkout@v2
       - name: Install Docker
         run : |
-          echo "Updating apt sources"
-          echo "deb http://ftp.au.debian.org/debian buster main" > /etc/apt/sources.list
-          apt-get update --allow-unauthenticated --allow-insecure-repositories
-          apt-get install docker.io -y
+          apt-get install ca-certificates curl gnupg
+          install -m 0755 -d /etc/apt/keyrings
+          curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+          chmod a+r /etc/apt/keyrings/docker.gpg
+          echo "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+          apt-get update
+          apt-get install docker-ce-cli -y          
       - name: Build Docker image
         run : |        
           echo "${{ secrets.DOCKERGIT_TOKEN }}" | docker login git.woodburn.au -u nathanwoodburn --password-stdin
@@ -37,4 +40,4 @@ jobs:
           docker tag hns_doh:$tag_num git.woodburn.au/nathanwoodburn/hns_doh:$tag_num
           docker push git.woodburn.au/nathanwoodburn/hns_doh:$tag_num
           docker tag hns_doh:$tag_num git.woodburn.au/nathanwoodburn/hns_doh:$tag
-          docker push git.woodburn.au/nathanwoodburn/hns_doh:$tag
+          docker push git.woodburn.au/nathanwoodburn/hns_doh:$tag