Update test_and_publish.yml

.github/workflows/test_and_publish.yml

@@ -43,7 +43,9 @@ jobs:
       run: echo "GH_REF_SHORT=$(echo ${GITHUB_REF##*/})" >> $GITHUB_ENV
 
     - name: Install packages
-      run: apk add openssh-server xz tmux bash curl sudo gcc make musl-dev perl-dev unzip
+      run: |
+        apk update
+        apk add openssh-server xz tmux bash curl sudo gcc make musl-dev perl-dev unzip
     - name: Install fake apt-get
       run: echo 'if [ "$1" == "update" ]; then exec apk update; else exec apk add openssh-server xz; fi' > /usr/local/bin/apt-get && chmod +x /usr/local/bin/apt-get
     - name: Add localhost