Update GitHub workflow

.github/workflows/workflows.yaml

@@ -1,13 +1,16 @@
 name: Tests
 
-on: [ push ]
+on:
+  push:
+  workflow_dispatch:
 
 jobs:
   tests:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 8, 11 ]
+        java:
+          - 17
 
     steps:
       - uses: actions/checkout@v2
@@ -21,6 +24,10 @@ jobs:
           path: ~/.m2
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-m2
+      - name: Setup Docker
+        run: sudo apt-get -qq -y install conntrack socat ; nohup socat TCP-LISTEN:2375,reuseaddr,fork UNIX-CONNECT:/var/run/docker.sock &
+      - name: Pull Image
+        run: docker pull openanalytics/shinyproxy-integration-test-app
       - name: Build with Maven
         run: mvn -U clean install -DskipTests
       - name: Run Tests
@@ -31,6 +38,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - name: Set up JDK
+        uses: actions/setup-java@v1
+        with:
+          java-version: 17
       - name: Run Dependency Check
         run: mvn -Powasp-dependency-check verify -DskipTests
       - name: Archive code coverage results