added anaconda docker dev environment.

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/vscode/devcontainers/anaconda:0-3
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# Copy environment.yml (if found) to a temp location so we update the environment. Also
+# copy "noop.txt" so the COPY instruction does not fail if no environment.yml exists.
+COPY environment.yml* .devcontainer/noop.txt /tmp/conda-tmp/
+RUN if [ -f "/tmp/conda-tmp/environment.yml" ]; then umask 0002 && /opt/conda/bin/conda env update -n base -f /tmp/conda-tmp/environment.yml; fi \
+    && rm -rf /tmp/conda-tmp
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>

.devcontainer/base.Dockerfile

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+FROM continuumio/anaconda3 as upstream
+
+# Verify OS version is expected one
+RUN . /etc/os-release && if [ "${VERSION_CODENAME}" != "bullseye" ]; then exit 1; fi
+
+# Update, change owner
+RUN groupadd -r conda --gid 900 \
+    && chown -R :conda /opt/conda \
+    && chmod -R g+w /opt/conda \
+    && find /opt -type d | xargs -n 1 chmod g+s
+
+# Reset and copy updated files with updated privs to keep image size down
+FROM mcr.microsoft.com/vscode/devcontainers/base:0-bullseye
+COPY --from=upstream /opt /opt/
+
+# Copy library scripts to execute
+COPY .devcontainer/library-scripts/*.sh .devcontainer/add-notice.sh .devcontainer/library-scripts/*.env /tmp/library-scripts/
+
+# Setup conda to mirror contents from https://github.com/ContinuumIO/docker-images/blob/master/anaconda3/debian/Dockerfile
+ENV LANG=C.UTF-8 \
+    LC_ALL=C.UTF-8 \
+    PATH=/opt/conda/bin:$PATH
+ARG USERNAME=vscode
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get install -y --no-install-recommends \
+        bzip2 \
+        ca-certificates \
+        git \
+        libglib2.0-0 \
+        libsm6 \
+        libxcomposite1 \
+        libxcursor1 \
+        libxdamage1 \
+        libxext6 \
+        libxfixes3 \
+        libxi6 \
+        libxinerama1 \
+        libxrandr2 \
+        libxrender1 \
+        mercurial \
+        openssh-client \
+        procps \
+        subversion \
+        wget \
+    && apt-get upgrade -y \
+    && bash /tmp/library-scripts/add-notice.sh \
+    && mv -f "/tmp/library-scripts/meta.env" /usr/local/etc/vscode-dev-containers/meta.env \
+    && ln -s /opt/conda/etc/profile.d/conda.sh /etc/profile.d/conda.sh \
+    && echo ". /opt/conda/etc/profile.d/conda.sh" >> ~/.bashrc \
+    && echo "conda activate base" >> ~/.bashrc \
+    && groupadd -r conda --gid 900 \
+    && usermod -aG conda ${USERNAME} \
+    && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts/add-notice.sh
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+ENV NVM_DIR=/usr/local/share/nvm
+ENV NVM_SYMLINK_CURRENT=true \
+    PATH=${NVM_DIR}/current/bin:${PATH}
+RUN bash /tmp/library-scripts/node-debian.sh "${NVM_DIR}" "${NODE_VERSION}" "${USERNAME}" \
+    && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts
+
+# Copy environment.yml (if found) to a temp locaition so we update the environment. Also
+# copy "noop.txt" so the COPY instruction does not fail if no environment.yml exists.
+COPY environment.yml* .devcontainer/noop.txt /tmp/conda-tmp/
+RUN if [ -f "/tmp/conda-tmp/environment.yml" ]; then umask 0002 && /opt/conda/bin/conda env update -n base -f /tmp/conda-tmp/environment.yml; fi \
+    && rm -rf /tmp/conda-tmp
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>

.devcontainer/devcontainer.json

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+{
+	"name": "Anaconda (Python 3)",
+	"build": { 
+		"context": "..",
+		"dockerfile": "Dockerfile",
+		"args": {
+			"NODE_VERSION": "lts/*"
+		}
+	},
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": { 
+				"python.defaultInterpreterPath": "/opt/conda/bin/python",
+				"python.linting.enabled": true,
+				"python.linting.pylintEnabled": true,
+				"python.formatting.autopep8Path": "/opt/conda/bin/autopep8",
+				"python.formatting.yapfPath": "/opt/conda/bin/yapf",
+				"python.linting.flake8Path": "/opt/conda/bin/flake8",
+				"python.linting.pycodestylePath": "/opt/conda/bin/pycodestyle",
+				"python.linting.pydocstylePath": "/opt/conda/bin/pydocstyle",
+				"python.linting.pylintPath": "/opt/conda/bin/pylint"
+			},
+
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"ms-python.python",
+				"ms-python.vscode-pylance"
+			]
+		}
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "python --version",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode"
+}

.devcontainer/noop.txt

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+This file copied into the container along with environment.yml* from the parent
+folder. This file is included to prevents the Dockerfile COPY instruction from 
+failing if no environment.yml is found.