Ubuntu 16.04 with Python 3.6 devcontainer

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/docker-existing-dockerfile
+{
+	"name": "Existing Dockerfile",
+	"build": {
+		// Sets the run context to one level up instead of the .devcontainer folder.
+		"context": "..",
+		// Update the 'dockerFile' property if you aren't using the standard 'Dockerfile' filename.
+		"dockerfile": "../Dockerfile"
+	}
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Uncomment the next line to run commands after the container is created.
+	// "postCreateCommand": "cat /etc/os-release",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as an existing user other than the container default. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "devcontainer"
+}

Dockerfile

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+FROM ubuntu:16.04
+
+WORKDIR /
+RUN apt-get update
+RUN apt-get install -y git gcc g++ make
+RUN apt-get install -y zlib1g zlib1g-dev
+RUN apt-get install -y libssl-dev libncurses5-dev libsqlite3-dev libreadline-dev libtk8.6 libgdm-dev libdb4o-cil-dev libpcap-dev
+RUN apt-get install -y libsasl2-dev libldap2-dev libssl-dev
+
+RUN git clone https://github.com/deadsnakes/python3.6
+WORKDIR /python3.6
+RUN ./configure --enable-optimizations
+RUN make
+RUN make test
+RUN make install
+
+RUN python3.6 -m pip install pip --upgrade
+RUN python3.6 -m pip install wheel
+
+RUN pip3 install pyOpenSSL
+COPY requirements.txt .
+RUN pip3 install -r requirements.txt