Add network operations prototype

Author: istathar

README.md

@@ -56,19 +56,37 @@ for Zed, with VS Code and NeoVim on the way.
 To give a sense of the flavour of the language, here are a small selection of
 Technique source files rendered to PDFs using the _technique render_ command.
 
-First, from a the recipe for a roast turkey during the holidays:
+### Systems and Operations
+
+One of the original use cases behind this work was wanting to document the
+procedures used in systems administration and network operations. This example
+shows a simple list of such tasks:
+
+<a href="tests/samples/LocalNetwork.tq">
+<img width=613 src="examples/screenshots/LocalNetwork.png">
+</a>
+
+### Recipes
+
+Preparing a meal during the holidays is also a list of tasks, but often more
+than one person needs to do things concurrently:
 
 <a href="examples/prototype/ChristmasTurkey.tq">
 <img width=608 src="examples/screenshots/ChristmasTurkey.png">
 </a>
 
+
+### Instructions
+
 This from a set of instructions guiding staff of what to do when an incident
 occurs:
 
 <a href="examples/prototype/DontPanic.tq">
 <img width=593 src="examples/screenshots/DontPanic.png">
 </a>
 
+### Larger processes
+
 Finally, an example showing using Technique to describe a much larger
 procedure, in this case the entire process of doing systems engineering on a
 software project. This pushes the limits of what the language is for, but

examples/screenshots/LocalNetwork.png

@@ -0,0 +1,15 @@
+local_network :
+
+# Local Network Connectivity
+
+Establish that the local network environment is functioning.
+
+    1.  Check physical network interface { exec(
+        ```bash
+            ip addr
+        ```
+        ) } and look for eth0 being marked UP.
+    2.  Check local network connectivity
+    3.  Check local DHCP is working
+    4.  Check local DNS responding
+    5.  Verify reachability of local network gateway