CI: try ubuntu-latest in main.yml

.github/workflows/main.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   pre-build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     outputs:
       image_tag: ${{ steps.prep.outputs.image_tag }}
     steps:

build_test_publish.sh

@@ -29,7 +29,7 @@ export $(echo_versioner_env_vars)
 exit_zero_if_show_help "$@"
 exit_non_zero_unless_installed docker
 exit_non_zero_unless_installed docker-compose
-on_ci_upgrade_docker_compose
+# on_ci_upgrade_docker_compose
 remove_old_images
 #generate_env_var_yml_files
 on_ci_kosli_create_flow

sh/on_ci_upgrade_docker_compose.sh

@@ -7,6 +7,17 @@ on_ci_upgrade_docker_compose()
     echo 'not on CI so not upgrading docker-compose'
   else
     echo 'on CI so upgrading docker-compose'
+    # docker-compose.yml uses this:
+    #
+    # volumes:
+    #  - type: tmpfs
+    #    target: /tmp
+    #    tmpfs:
+    #      mode: 01777
+    #
+    # and the mode: option is not supported in the version of docker-compose
+    # currently installed in ubuntu-latest in the Github Action's main.yml
+    #
     # https://stackoverflow.com/questions/49839028
     sudo curl -L "https://github.com/docker/compose/releases/download/`curl -fsSLI -o /dev/null -w %{url_effective} https://github.com/docker/compose/releases/latest | sed 's#.*tag/##g' && echo`/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose && sudo chmod +x /usr/local/bin/docker-compose
   fi