<% if node_version and yarn_version -%> # Install JavaScript dependencies <% elsif node_version -%> # Install Node.js <% elsif yarn_version -%> # Install yarn <% end -%> <% if node_version -%> ARG NODE_VERSION=<%= node_version %> <% end -%> <% if yarn_version -%> ARG YARN_VERSION=<%= yarn_version %> <% end -%> <% if node_version -%> RUN curl -fsSL https://fnm.vercel.app/install | bash && \ /root/.local/share/fnm/fnm install $NODE_VERSION ENV PATH=/root/.local/share/fnm/aliases/default/bin/:$PATH <% end -%> <% if yarn_version -%> RUN npm install -g yarn@$YARN_VERSION <% end -%>