refactor(fractal): reorganise templates

Refs: OD-44

templates/fractal/Dockerfile.twig

@@ -0,0 +1,20 @@
+FROM node:{{ node.version }} AS base
+
+WORKDIR {{ project_root }}
+
+RUN mkdir /node_modules \
+  && chown node:node -R {{ project_root }} /node_modules
+
+COPY --chown=node:node package*.json *yarn* {{ project_root }}
+
+USER node
+
+################################################################################
+
+FROM base AS build
+
+RUN yarn install --frozen-lockfile
+
+COPY --chown=node:node . .
+
+CMD ["bash"]