Edit Pipeline

Edit UI <%= form_tag Routes.pipeline_path(@conn, :update, @pipeline.id), method: :put do %>
<%= text_input :pipeline, :name, value: @name, placeholder: "My New Pipeline", class: "form-control" %>
<%= textarea :pipeline, :stages, value: @stages_json, class: "form-control", rows: 15, style: "font-family: monospace;" %>
<%= submit "Edit Pipeline", class: "btn btn-primary" %>
<% end %>