Add devcontainer to project

.devcontainer/Dockerfile

@@ -0,0 +1,40 @@
+FROM debian:buster-slim
+
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        ca-certificates \
+        \
+        # .NET Core dependencies
+        libc6 \
+        libgcc1 \
+        libgssapi-krb5-2 \
+        libicu63 \
+        libssl1.1 \
+        libstdc++6 \
+        zlib1g \
+        curl \
+        git \
+        procps \
+        wget \
+    && rm -rf /var/lib/apt/lists/*
+
+
+ENV \
+    # Enable detection of running in a container
+    DOTNET_RUNNING_IN_CONTAINER=true \
+    DOTNET_INSTALL_DIR=/usr/share/dotnet/ \
+    DOTNET_ROOT=/usr/share/dotnet/
+
+COPY ./.devcontainer/install-dotnets.sh global.json* .
+
+RUN /bin/bash install-dotnets.sh
+
+ENV PATH="$DOTNET_ROOT:${PATH}"
+RUN ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet
+
+RUN  dotnet --info
+
+# Copy endpoint specific user settings into container to specify
+# .NET Core should be used as the runtime.
+COPY ./.devcontainer/settings.vscode.json /root/.vscode-remote/data/Machine/settings.json

.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+	"name": "dotnet",
+	// Set the build context one level higher so we can grab metadata like global.json
+	"context": "..",
+	"dockerFile": "Dockerfile",
+	"forwardPorts": [
+		0
+	],
+	"extensions": [
+		"ionide.ionide-fsharp",
+		"ms-dotnettools.csharp",
+		"editorconfig.editorconfig",
+		"ionide.ionide-paket",
+		"ionide.ionide-fake"
+	]
+}

.devcontainer/install-dotnets.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# downloads installer script https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-install-script
+curl -SL --output dotnet-install.sh https://dot.net/v1/dotnet-install.sh
+
+
+# Attempt to install via global.json first
+FILE=global.json
+if test -f "$FILE"; then
+    echo "installing dotnet via $FILE"
+    /bin/bash dotnet-install.sh --verbose --jsonfile $FILE
+fi
+
+
+# Add additional versions if required
+DOTNET_VERSIONS=(
+    # 'latest'
+    # '5.0.100'
+)
+for version in ${DOTNET_VERSIONS[@]}; do
+   echo "installing dotnet $version"
+   /bin/bash dotnet-install.sh --verbose --version $version
+done

.devcontainer/settings.vscode.json

@@ -0,0 +1,3 @@
+{
+    "FSharp.fsacRuntime":"netcore"
+}