Introduce doc/examples/ directory

It contains simple usual setups to get started with osmo-gsm-tester,
such as creating a 4G network using srsLTE or a 2G network using the
osmocom stack (+ ofono modems).

Change-Id: I55d5b1152da201799af21a77ef6c562f97bd94fc
diff --git a/doc/examples/2g_osmocom/resources.conf b/doc/examples/2g_osmocom/resources.conf
new file mode 100644
index 0000000..087c445
--- /dev/null
+++ b/doc/examples/2g_osmocom/resources.conf
@@ -0,0 +1,40 @@
+# all hardware and interfaces available to this osmo-gsm-tester
+
+ip_address:
+- addr: 10.42.42.2
+- addr: 10.42.42.3
+- addr: 10.42.42.4
+- addr: 10.42.42.5
+- addr: 10.42.42.6
+- addr: 10.42.42.7
+
+bts:
+- label: Ettus B200
+  type: osmo-bts-trx
+  ipa_unit_id: 6
+  addr: 10.42.42.50
+  band: GSM-1800
+  ciphers: [a5_0, a5_1, a5_3]
+  osmo_trx:
+    type: uhd
+    launch_trx: true
+    remote_user: jenkins
+    trx_ip: 10.42.42.116
+    dev_args: "type=b200,serial=306BD11"
+    clock_reference: external
+    multi_arfcn: true
+
+modem:
+- label: sierra_1st
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.4/1-5.4.1/1-5.4.1.2'
+  ki: 'EBAB63D06C3F546A16C977CB40E57C68'
+  auth_algo: 'comp128v1'
+  ciphers: [a5_0, a5_1]
+  features: ['2g', 'sms', 'voice', 'ussd', 'sim']
+
+- label: ec20_1
+  path: '/sys/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5.4/1-5.4.1/1-5.4.1.6'
+  ki: '07F35D0A9476646169669401215580E0'
+  auth_algo: 'comp128v1'
+  ciphers: [a5_0, a5_1]
+  features: ['2g', 'sms', 'voice', 'ussd', 'gprs', 'sim']