Adds devcontainer

Author: robmarkcole

.devcontainer/Dockerfile

@@ -0,0 +1,37 @@
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM python:3.7
+
+# Avoid warnings by switching to noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Copy requirements.txt (if found) to a temp locaition so we can install it. Also
+# copy "noop.txt" so the COPY instruction does not fail if no requirements.txt exists.
+COPY requirements.txt* .devcontainer/noop.txt /tmp/pip-tmp/
+
+# Configure apt and install packages
+RUN apt-get update \
+    && apt-get -y install --no-install-recommends apt-utils 2>&1 \
+    #
+    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
+    && apt-get -y install git procps lsb-release \
+    #
+    # Install pylint
+    && pip install pylint \
+    #
+    # Update Python environment based on requirements.txt (if presenet)
+    && if [ -f "/tmp/pip-tmp/requirements.txt" ]; then pip install -r /tmp/pip-tmp/requirements.txt; fi \
+    && rm -rf /tmp/pip-tmp \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
+
+# Switch back to dialog for any ad-hoc use of apt-get
+ENV DEBIAN_FRONTEND=dialog
+
+

.devcontainer/devcontainer.json

@@ -0,0 +1,21 @@
+// See https://aka.ms/vscode-remote/devcontainer.json for format details.
+{
+	"name": "Python 3",
+	"context": "..",
+	"dockerFile": "Dockerfile",
+
+	// Uncomment the next line if you want to publish any ports.
+	// "appPort": [],
+
+	// Uncomment the next line to run commands after the container is created.
+	// "postCreateCommand": "python --version",
+
+	"extensions": [
+		"ms-python.python"
+	],
+	"settings": {
+		"python.pythonPath": "/usr/local/bin/python",
+		"python.linting.pylintEnabled": true,
+		"python.linting.enabled": true
+	}
+}

.devcontainer/noop.txt

@@ -0,0 +1,3 @@
+This file is copied into the container along with requirements.txt* from the
+parent folder. This is done to prevent the Dockerfile COPY instruction from 
+failing if no requirements.txt is found.

.gitignore

@@ -113,4 +113,5 @@ venv.bak/
 dmypy.json
 
 # Pyre type checker
-.pyre/
+.pyre/
+.DS_Store

setup.py

@@ -14,7 +14,7 @@
     install_requires=REQUIRES,
     packages=find_packages(),
     license="Apache License, Version 2.0",
-    python_requires=">=3.5",
+    python_requires=">=3.7",
     classifiers=[
         "Intended Audience :: Developers",
         "Natural Language :: English",