Containerize

I've wrapped this set of scripts in a container so that it is easier to use it for the readiness probe in the OpenLDAP Helm chart.

.dockerignore

+# Don't track git
+.git/*
+.github/*
+.gitignore
+.gitattributes
+
+# Don't track cargo generated files
+target/*
+
+# Don't track the generated JS
+app/pkg/*
+
+# Don't track changes to the Dockerfile, triggering a rebuild without cache
+Dockerfile
+.dockerignore
+
+# Don't track docs
+*.md
+LICENSE
+CHANGELOG.md
+README.md
+docs/*
+example_configs/*
+
+# Output of `npm install rollup`
+node_modules/*
+package-lock.json
+package.json
+
+# Pre-build binaries
+*.tar.gz
+
+# Various config files that shouldn't be tracked
+.env