Add Docker build

Dockerfile

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+FROM debian:12-slim
+
+# set work directory
+WORKDIR /usr/src/app
+
+# Print output
+RUN export TERM=xterm
+
+# install software
+RUN apt update
+RUN apt install -y emacs-nox
+
+# Build
+COPY build.el .
+ENTRYPOINT emacs --batch --script build.el

build.el

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+(progn
+  (require 'package)
+  (add-to-list 'package-archives
+	       '("melpa" . "https://melpa.org/packages/") t)
+  (package-initialize)
+  (package-refresh-contents)
+  (package-install 'one)
+  (one-build))

compose.yaml

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+
+services:
+
+  one-el:
+    build: .
+    restart: "no"
+    volumes:
+      - .:/usr/src/app/