Refactor baseimage building to baseimage.sh

hack/libhack/baseimage.sh

@@ -39,6 +39,27 @@ baseimage::release() {
     popd
 }
 
+baseimage::builddocs() {
+    mount_point="/mnt/docs"
+
+    docker run --rm                                         \
+               -ti                                          \
+               -v "${BASEIMAGE_PATH}"/docs:"${mount_point}" \
+               "${BASEIMAGE_NAME}"                          \
+               /bin/bash -c                                 \
+                    "cd ${mount_point}
+                    pip3 install sphinx
+                    make html
+                    exit"                                   \
+               &> /dev/null
+
+    if [ "$?" == "0" ]; then
+        echo "Built baseimage docs at ${BASEIMAGE_PATH}/docs/build/html!"
+    else
+        echo "Building baseimage docs failed!"
+    fi
+}
+
 releasename() {
     local version
     local date