Add script to build all docs

bin/build-docs.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Build all docs with one command
+# Documentation will be placed in `build/docs`.
+
+set -e
+
+CRATE_NAME=glean_core
+
+pushd docs &&
+    mdbook build &&
+    popd
+
+cargo doc --no-deps
+
+rm -rf build/docs
+mkdir -p build/docs
+echo '<meta http-equiv=refresh content=0;url=book/index.html>' > build/docs/index.html
+
+mkdir -p build/docs/book
+cp -a docs/book/. build/docs/book
+
+mkdir -p build/docs/docs
+cp -a target/doc/. build/docs/docs
+printf '<meta http-equiv=refresh content=0;url=%s/index.html>\n' "$CRATE_NAME" > build/docs/docs/index.html