maint: let installer ensure /etc/sudoers.d directory exists

integration-tests/Dockerfile

@@ -24,8 +24,6 @@ RUN find /etc/systemd/system \
     -not -name '*systemd-user-sessions*' \
     -exec rm \{} \;
 
-RUN mkdir -p /etc/sudoers.d
-
 RUN systemctl set-default multi-user.target
 
 STOPSIGNAL SIGRTMIN+3

tljh/installer.py

@@ -126,6 +126,7 @@ def ensure_usergroups():
     user.ensure_group("jupyterhub-users")
 
     logger.info("Granting passwordless sudo to JupyterHub admins...")
+    os.makedirs("/etc/sudoers.d/", exist_ok=True)
     with open("/etc/sudoers.d/jupyterhub-admins", "w") as f:
         # JupyterHub admins should have full passwordless sudo access
         f.write("%jupyterhub-admins ALL = (ALL) NOPASSWD: ALL\n")