unipi: Use git+ssh as git+https is broken

Unipi adds a double slash to the path, and gitea doesn't like that.

roles/docker/tasks/services/websites.yml

@@ -39,7 +39,8 @@
       VIRTUAL_HOST: "new-new.{{ data_coop_website.domains|join(',') }}"
       LETSENCRYPT_HOST: "new-new.{{ data_coop_website.domains|join(',') }}"
       LETSENCRYPT_EMAIL: "{{ letsencrypt_email }}"
-    command: --remote=https://git.data.coop/halfd/new-website.git#main
+    # The ssh-key is for read-only only
+    command: --remote=https://git.data.coop/halfd/new-website.git#main --ssh-key Ag9RekCyC2eow4P/e5crVvSTQ7dTK46WkG0wqEPVJbU= --ssh-authenticator SHA256:yMAwgOC5u2wy27PxkJRCN0Eegypj5xq6pPRLeDrHcR4
     capabilities:
       - NET_ADMIN
     devices: