Add nightly build of centos7 (#6355)

.github/workflows/centos7.yml

@@ -0,0 +1,80 @@
+name: centOS 7 (without geomech)
+
+on:
+  schedule:
+    # Once every night
+    - cron: '0 1 * * * '
+jobs:
+  build_on_centos7:
+    runs-on: ubuntu-latest
+    container:
+      image: centos:7
+    steps:
+    - name: Intall Dependencies
+      run: | 
+        yum install -y centos-release-scl
+        yum-config-manager --enable rhel-server-rhscl-7-rpms
+      
+        yum install -y https://repo.ius.io/ius-release-el7.rpm
+        yum install -y git222
+
+        yum install -y qt5-qtbase
+        yum install -y qt5-qtbase-devel
+        yum install -y qt5-qtscript-devel
+
+        yum install -y cmake3
+        yum install -y make
+
+        yum install -y mesa-libGL-devel
+        yum install -y freeglut-devel
+
+        yum install -y devtoolset-7
+        
+        yum install -y rh-python36
+     
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        submodules: true
+          
+    - name: Build ResInsight
+      run: | 
+        
+        source /opt/rh/devtoolset-7/enable
+        source /opt/rh/rh-python36/enable
+        
+        cmake3 --version
+        git --version
+        g++ --version
+        python --version
+
+        python -m pip install --upgrade pip
+        python -m pip install grpcio-tools
+
+        vcpkg/bootstrap-vcpkg.sh 
+        vcpkg/vcpkg install grpc
+        
+        mkdir cmakebuild
+        cd cmakebuild
+        cmake3 \
+        -DRESINSIGHT_QT5_BUNDLE_LIBRARIES=ON \
+        -DRESINSIGHT_ENABLE_GRPC=true \
+        -DRESINSIGHT_ENABLE_UNITY_BUILD=true \
+        -DVCPKG_TARGET_TRIPLET=x64-linux \
+        -DCMAKE_TOOLCHAIN_FILE=../vcpkg/scripts/buildsystems/vcpkg.cmake \
+        -DRESINSIGHT_GRPC_PYTHON_EXECUTABLE=python \
+        ..
+        
+        make -j8
+        make package
+        rm -rf packages/_CPack_Packages
+        
+        # Show file structure
+        pwd
+        ls
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v2
+      with:
+        name: ResInsight
+        path: ./cmakebuild/packages