update CI with conda

.github/workflows/buildTest.yml

@@ -10,6 +10,9 @@ jobs:
     name: Build test
     # Set the type of machine to run on
     runs-on: ubuntu-20.04
+    defaults:
+      run:
+        shell: bash -l {0}
     container: ros:noetic
     # Only run when merging to main.
     if: github.ref == 'refs/heads/main'
@@ -30,11 +33,21 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
+      - uses: conda-incubator/setup-miniconda@v2
+        with:
+          miniconda-version: "latest"
+          channels: bioconda, conda-forge, defaults
+          use-only-tar-bz2: true  # IMPORTANT: This needs to be set for caching to work properly!
+          auto-update-conda: true
+          auto-activate-base: true
+
       - name: Install dependencies
         run: |
           cd $GITHUB_WORKSPACE
-          $CONDA/bin/conda env create -f environment.yml
-          $CONDA/bin/conda activate codebotler
+          echo "begin: PATH=$PATH;"
+          conda env create -f environment.yml
+          conda activate codebotler || true
+          echo "after conda activate codebotler: PATH=$PATH;"
           pip3 install torch torchvision torchaudio
 
       - name: Catkin make