Update gitea download and switch to xz files

XZ files are downloaded
Change that any grep is replaced by jq command, and sed for " replace

Add systemd service files as samples

systemd/act_runner.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Gitea Actions runner
+Documentation=https://gitea.com/gitea/act_runner
+After=docker.service
+
+[Service]
+ExecStart=/usr/local/bin/act_runner daemon --config /etc/act_runner/config.yaml
+ExecReload=/bin/kill -s HUP $MAINPID
+WorkingDirectory=/var/lib/act_runner
+TimeoutSec=0
+RestartSec=10
+Restart=always
+User=act_runner
+
+[Install]
+WantedBy=multi-user.target

systemd/gitea.service

@@ -0,0 +1,32 @@
+[Unit]
+Description=Gitea (Git with a cup of tea)
+After=syslog.target
+After=network.target
+#After=mysqld.service
+After=postgresql.service
+#After=memcached.service
+#After=redis.service
+
+[Service]
+# Modify these two values and uncomment them if you have
+# repos with lots of files and get an HTTP error 500 because
+# of that
+###
+#LimitMEMLOCK=infinity
+#LimitNOFILE=65535
+RestartSec=2s
+Type=simple
+User=git
+Group=git
+WorkingDirectory=/var/lib/gitea/
+ExecStart=/usr/local/bin/gitea web -c /etc/gitea/app.ini
+Restart=always
+Environment=USER=git HOME=/home/git GITEA_WORK_DIR=/var/lib/gitea
+# If you want to bind Gitea to a port below 1024 uncomment
+# the two values below
+###
+#CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+#AmbientCapabilities=CAP_NET_BIND_SERVICE
+
+[Install]
+WantedBy=multi-user.target