Add a development container.

.devcontainer/Containerfile

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+FROM mcr.microsoft.com/devcontainers/base:ubuntu
+
+RUN apt-get -y update && apt-get -y install curl git unzip build-essential autoconf m4 libncurses5-dev libwxgtk3.2-dev libwxgtk-webview3.2-dev libgl1-mesa-dev libglu1-mesa-dev libpng-dev libssh-dev unixodbc-dev xsltproc fop libxml2-utils libncurses-dev openjdk-11-jdk
+RUN git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.14.0
+RUN echo ". \$HOME/.asdf/asdf.sh" >> "$HOME/.bashrc" && \
+  . "$HOME/.asdf/asdf.sh" && \
+  asdf plugin add erlang https://github.com/asdf-vm/asdf-erlang.git && \
+  asdf plugin add elixir https://github.com/asdf-vm/asdf-elixir.git && \
+  asdf install erlang 27 && \
+  asdf install elixir v1.17.2

.devcontainer/devcontainer.json

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+{
+    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "JakeBecker.elixir-ls"
+            ]
+        }
+    }
+}