doc: document we have the ci/ scripts

Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/doc/process/building-with-ci.rst b/doc/process/building-with-ci.rst
new file mode 100644
index 0000000..471681d
--- /dev/null
+++ b/doc/process/building-with-ci.rst
@@ -0,0 +1,11 @@
+Building with ci scripts
+========================
+
+op-build has several build scripts in the ci/ directory aimed at being used to
+help continuous integration environments, as well as specifying build
+dependencies as code.
+
+These use Docker containers for the build environment.
+
+It is recommended you use (or send patches so that you can use them) these over
+rolling your own scripts.
diff --git a/doc/process/index.rst b/doc/process/index.rst
index a8443ba..4efe358 100644
--- a/doc/process/index.rst
+++ b/doc/process/index.rst
@@ -5,3 +5,4 @@
 
    CONTRIBUTING.md
    KernelTree.rst
+   building-with-ci