ci: install node for building

.gitlab-ci.yml

@@ -3,6 +3,11 @@ stages:
     - tag
     - deploy
 
+default:
+    before_script:
+        - curl -sL https://deb.nodesource.com/setup_15.x | sudo -E bash -
+        - apt-get install nodejs yarn
+
 # The test stage runs on every build and every branch.
 test:
     image: mcr.microsoft.com/dotnet/sdk:5.0
@@ -62,6 +67,7 @@ deploy:
     image: mcr.microsoft.com/dotnet/sdk:5.0
     needs: []
     stage: deploy
+    before_script: []
     script:
         - scripts/set-build-version.sh
         - dotnet restore

.tool-versions

@@ -1,2 +1,3 @@
 dotnet-core 5.0.100
 yarn 1.22.10
+nodejs 15.0.1