GitHub actions docker build

.github/workflows/manubot.yaml

@@ -21,6 +21,22 @@ jobs:
         with:
           # fetch entire commit history to support get_rootstock_commit
           fetch-depth: 0
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Docker login
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          context: build
+          tags: |
+            ${{ github.repository_owner }}/manubot:latest
       - name: Set Environment Variables
         run: |
           TRIGGERING_SHA=${GITHUB_PULL_REQUEST_SHA:-$GITHUB_SHA}
@@ -37,13 +53,13 @@ jobs:
           key: ci-cache-${{ github.ref }}
           restore-keys: |
             ci-cache-${{ env.DEFAULT_BRANCH_REF }}
-      - name: Install Environment
-        uses: conda-incubator/setup-miniconda@v2
-        with:
-          activate-environment: manubot
-          environment-file: build/environment.yml
-          auto-activate-base: false
-          miniconda-version: 'latest'
+      # - name: Install Environment
+      #   uses: conda-incubator/setup-miniconda@v2
+      #   with:
+      #     activate-environment: manubot
+      #     environment-file: build/environment.yml
+      #     auto-activate-base: false
+      #     miniconda-version: 'latest'
       - name: Install Spellcheck
         shell: bash --login {0}
         run: |

build/Dockerfile

@@ -0,0 +1,16 @@
+FROM condaforge/miniforge3:latest
+
+ARG CONDA_PREFIX=/opt/conda
+ARG CONDA_ENV=manubot
+
+COPY environment.yml /
+RUN conda env create \
+  --prefix=$CONDA_PREFIX/envs/$CONDA_ENV \
+  --file=/environment.yml \
+  && conda clean --all --force-pkgs-dirs --yes
+
+ENV PATH $CONDA_PREFIX/envs/$CONDA_ENV/bin:$PATH
+RUN echo "conda activate $CONDA_ENV" > ~/.bashrc
+RUN /bin/bash -c "conda activate $CONDA_ENV"
+
+ENV CONDA_DEFAULT_ENV=$CONDA_ENV