Add workflow to run unit specs

.github/workflows/ruby.yml

@@ -0,0 +1,37 @@
+name: Run Specs
+on: [push, pull_request]
+
+jobs:
+  unit_specs:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        sub_project:
+        - common
+        - core
+        - dev
+        - director-core
+        - monitor
+        - nats-sync
+        - template
+    steps:
+    - uses: actions/checkout@v4
+      with: { lfs: true}
+    - uses: ruby/setup-ruby@v1
+      with: { working-directory: src/ }
+    - run: bundle install && bundle exec rake spec:unit:${{matrix.sub_project}}:parallel
+      working-directory: src/
+
+  unit_specs_director:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with: { lfs: true}
+    - uses: ruby/setup-ruby@v1
+      with: { working-directory: src/ }
+    - run: |
+        sudo systemctl start postgresql.service && \
+        initdb -U postgres && \
+        bundle install && \
+        DB=postgresql DB_USER=postgres DB_PASS= bundle exec rake spec:unit:director:parallel
+      working-directory: src/