add CI config

Author: overheadhunter

.github/workflows/build.yml

@@ -0,0 +1,51 @@
+name: Build
+
+on:
+  [push]
+
+jobs:
+  build:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    if: "!contains(github.event.head_commit.message, '[ci skip]') && !contains(github.event.head_commit.message, '[skip ci]')"
+    env:
+      BUILD_VERSION: SNAPSHOT
+    outputs:
+      artifact-version: ${{ steps.setversion.outputs.version }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 11
+          server-id: bintray-jcenter
+          server-username: BINTRAY_USERNAME
+          server-password: BINTRAY_API_KEY
+      - uses: actions/cache@v1
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+      - name: Ensure to use tagged version
+        run: mvn versions:set --file ./pom.xml -DnewVersion=${GITHUB_REF##*/}
+        if: startsWith(github.ref, 'refs/tags/')
+      - name: Export the project version to the job environment and fix it as an ouput of this job
+        id: setversion
+        run: |
+          v=$(mvn help:evaluate "-Dexpression=project.version" -q -DforceStdout)
+          echo "BUILD_VERSION=${v}" >> $GITHUB_ENV
+          echo "::set-output name=version::${v}"
+        shell: bash
+      - name: Build and Test
+        run: mvn -B install
+      - name: Upload .jars
+        uses: actions/upload-artifact@v2
+        with:
+          name: integrations-linux-${{ env.BUILD_VERSION }}
+          path: target/integrations-linux-*.jar
+      - name: Build and deploy to jcenter
+        if: startsWith(github.ref, 'refs/tags/')
+        run: mvn -B deploy -DskipTests
+        env:
+          BINTRAY_USERNAME: cryptobot
+          BINTRAY_API_KEY: ${{ secrets.BINTRAY_API_KEY }}