Basic docker vscode dev container with python base image.

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.122.1/containers/docker-existing-docker-compose
+// If you want to run as a non-root user in the container, see .devcontainer/docker-compose.yml.
+{
+	"name": "Python(Extend)",
+
+	// Update the 'dockerComposeFile' list if you have more compose files or use different names.
+	// The .devcontainer/docker-compose.yml file contains any overrides you need/want to make.
+	"dockerComposeFile": [
+		"../docker-compose.dev.yml"
+	],
+
+	// The 'service' property is the name of the service for the container that VS Code should
+	// use. Update this value and .devcontainer/docker-compose.yml to the real service name.
+	"service": "python",
+
+	// The optional 'workspaceFolder' property is the path VS Code should open by default when
+	// connected. This is typically a file mount in .devcontainer/docker-compose.yml
+	"workspaceFolder": "/usr/src/app",
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": "bash"
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Uncomment the next line if you want start specific services in your Docker Compose config.
+	// "runServices": [],
+
+	// Uncomment the next line if you want to keep your containers running after VS Code shuts down.
+	// "shutdownAction": "none",
+
+	// Uncomment the next line to run commands after the container is created - for example installing curl.
+	// "postCreateCommand": "apt-get update && apt-get install -y curl",
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+}

.dockerignore

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+.gitignore
+/docker/

docker-compose.dev.yml

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+version: "3.7"
+
+services:
+    python:
+        build:
+            context: ./
+            dockerfile: ./docker/Dockerfile
+        volumes: 
+            - .:/usr/src/app
+        env_file:
+            - docker.environment
+        networks: 
+            - default

docker/Dockerfile

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+FROM python:3.9
+
+COPY [".", "/usr/src/app"]
+
+WORKDIR /usr/src/app
+
+CMD tail -f /dev/null