Github actions use nix

.github/workflows/release-nightly.yml

@@ -5,36 +5,20 @@ on:
       - "master"
 jobs:
   release-nightly:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: true
-      matrix:
-        java: [ 'openjdk@1.17' ]
     steps:
       - uses: actions/checkout@v4.1.1
         with:
           fetch-depth: 0
-      - uses: olafurpg/setup-scala@v14
-        with:
-          java-version: ${{ matrix.java }}
-      - uses: jorelali/setup-elm@v5
-        with:
-          elm-version: 0.19.1
-      - uses: bahmutov/npm-install@v1
-        with:
-          working-directory: modules/webapp
-      # - name: Coursier cache
-      #   uses: coursier/cache-action@v6
+      - uses: cachix/install-nix-action@v26
       - name: Set current version
         run:  echo "DOCSPELL_VERSION=$(cat version.sbt | grep version | cut -d= -f2 | xargs)" >> $GITHUB_ENV
       - name: sbt ci ${{ github.ref }}
-        run: sbt ci
-        env:
-          SBT_OPTS: "-Xmx2G -Xss4m"
+        run: nix develop .#ci --command sbt ci
       - name: sbt make-pkg (${{ env.DOCSPELL_VERSION }})
-        run: sbt make-pkg
-        env:
-          SBT_OPTS: "-Xmx2G -Xss4m"
+        run: nix develop .#ci --command sbt make-pkg
       - uses: "marvinpinto/action-automatic-releases@latest"
         with:
           repo_token: "${{ secrets.GITHUB_TOKEN }}"