feat(ci): migrates circleci to github actions

.github/workflows/build_and_test.yml

@@ -0,0 +1,120 @@
+name: Build and Test
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: eclipse-temurin:17-jdk
+    env:
+      _JAVA_OPTIONS: "-Xmx3G -Xms2G"
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Node.js
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_21.x | bash -
+          apt-get install -y nodejs
+      - name: Check Node.js version
+        run: node --version
+
+      - name: Cache Gradle packages
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Setup
+        run: |
+          apt update -y && apt install -y gnupg2
+
+      - name: Verify files
+        run: |
+          curl -sSL https://secchannel.rsk.co/SUPPORT.asc | gpg2 --import -
+          gpg2 --verify SHA256SUMS.asc && sha256sum --check SHA256SUMS.asc
+
+      - name: Build
+        run: |
+          ./configure.sh
+          ./gradlew --no-daemon dependencies
+          ./gradlew --no-daemon --stacktrace build -x test
+
+      - name: Persist workspace
+        uses: actions/upload-artifact@v3
+        with:
+          name: workspace
+          path: .
+
+  sonarqube:
+    needs: build
+    runs-on: ubuntu-latest
+    container:
+      image: eclipse-temurin:17-jdk
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run SonarQube analysis
+        env:
+          SONAR_URL: ${{ secrets.SONAR_URL }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        run: |
+          apt-get update && apt-get install -yqq git
+          extra_flags=""
+          if [ "${{ github.event_name }}" == "pull_request" ]; then
+            git branch -f master origin/master
+            pr_number=${{ github.event.pull_request.number }}
+            extra_flags="-Dsonar.pullrequest.base=master
+              -Dsonar.pullrequest.branch=${{ github.head_ref }}
+              -Dsonar.pullrequest.key=$pr_number"
+          else
+            extra_flags="-Dsonar.branch.name=master"
+          fi
+          ./gradlew sonarqube --no-daemon -x build -x test $extra_flags
+
+  unit-tests:
+    needs: build
+    runs-on: ubuntu-latest
+    container:
+      image: eclipse-temurin:17-jdk
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Node.js
+        run: |
+          curl -fsSL https://deb.nodesource.com/setup_21.x | bash -
+          apt-get install -y nodejs
+      - name: Check Node.js version
+        run: node --version
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: workspace
+          path: .
+      - name: Run unit tests
+        run: |
+          ./gradlew --no-daemon --stacktrace test
+
+      - name: Save test results
+        run: |
+          mkdir -p ${{ github.workspace }}/junit/
+          find rskj-core/build/test-results -type f -name "*.xml" \
+              -exec cp {} ${{ github.workspace }}/junit/ \;
+        if: always()
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: junit-results
+          path: ${{ github.workspace }}/junit/