[FIX] Update Github CI workflow on push

.github/workflows/env.yaml

@@ -11,8 +11,8 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        os: [ubuntu-latest, ubuntu-22.04, ubuntu-20.04, ubuntu-18.04]
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        os: [ubuntu-20.04]
+        python-version: ["3.9"]
 
     runs-on: ${{matrix.os}}
 
@@ -24,16 +24,19 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Add conda to system path
       run: |
-        # $CONDA is an environment variable pointing to the root of the miniconda directory
         echo $CONDA/bin >> $GITHUB_PATH
+    - name: Configure Conda
+      run: |
+        conda init bash  # Replace "bash" with your shell if it's not bash
     - name: Install dependencies with conda
       run: |
         conda env update --file ./config/train_environment.yaml --name base
     - name: Install dependencies with pip
       run: |
         python -m pip install --upgrade pip
         pip install pylint
-        python -m pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cu113/torch1.10/index.html
+        pip install flake8
+        pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cu113/torch1.10/index.html
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names