refactor: move backend to monorepo

backend/Dockerfile

@@ -0,0 +1,13 @@
+FROM registry.gitlab.com/openstapps/projectmanagement/node
+
+USER root
+RUN apk add --update python3 py3-pip make g++
+
+USER node
+ADD --chown=node:node . /app
+WORKDIR /app
+RUN npm ci && npm run build
+
+EXPOSE 3000
+
+CMD ["node", "./lib/cli"]