Init a GitLab server

Some day i'll make up my mind on which server to use, honest!

ansible/roles/gitlab/files/gitlab.rb

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+external_url 'https://{{ pve_hosts.gitlab.ip }}'  # Obviously temporary
+nginx['redirect_http_to_https'] = false
+alertmanager['enable'] = false
+prometheus_monitoring['enable'] = false
+grafana['enable'] = false
+nginx['status'] = {
+    'enable' => false
+}
+
+nginx['ssl_certificate'] = "/etc/ssl/certs/ssl-cert-snakeoil.pem"
+nginx['ssl_certificate_key'] = "/etc/ssl/private/ssl-cert-snakeoil.key"
+letsencrypt['enable'] = false
+
+gitlab_rails['time_zone'] = '{{ TZ }}'
+
+# https://docs.gitlab.com/omnibus/settings/memory_constrained_envs.html
+puma['worker_processes'] = 2
+sidekiq['max_concurrency'] = 5
+gitaly['ruby_max_rss'] = 200_000_000
+gitaly['cgroups_count'] = 2
+gitaly['cgroups_mountpoint'] = '/sys/fs/cgroup'
+gitaly['cgroups_hierarchy_root'] = 'gitaly'
+gitaly['cgroups_memory_enabled'] = true
+gitaly['cgroups_memory_limit'] = 250000
+gitaly['cgroups_cpu_enabled'] = true
+gitaly['cgroups_cpu_shares'] = 512
+gitaly['env'] = {
+  'GITALY_COMMAND_SPAWN_MAX_PARALLEL' => '2'
+}
+
+
+gitlab_rails['gitlab_default_theme'] = 2
+
+nginx['real_ip_header'] = 'X-Forwarded-For'
+#nginx['real_ip_trusted_addresses'] = ['172.80.0.0/16']
+#gitlab_rails['trusted_proxies'] = ['172.80.0.0/16']