personal docker image

.github/workflows/docker-image.yml

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+
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build the Docker image
+        run: |
+          echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "neox101" --password-stdin
+          docker build . --file Dockerfile --tag neox101/emacs-image:v1
+          echo "Build Success!"
+          docker push neox101/emacs-image:v1

Dockerfile

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+
+FROM alpine:3.14
+
+MAINTAINER Iku Iwasa "iku.iwasa@gmail.com"
+
+RUN apk update && apk upgrade
+
+RUN apk add ca-certificates
+
+RUN apk add gcc make g++ zlib-dev
+
+RUN apk search sqlite
+
+RUN apk add sqlite
+
+RUN apk add coreutils
+
+RUN apk add gnupg
+
+RUN apk add rclone
+
+RUN apk add git
+
+RUN apk add emacs
+RUN /usr/bin/emacs --version || true
+
+# create .emacs.d
+WORKDIR /root
+RUN mkdir /root/.emacs.d/
+COPY init.el /root/.emacs.d/
+RUN ls /root/.emacs.d/
+COPY --chmod=777 entrypoint.sh /
+COPY publish.tar.gpg /root/
+
+ENTRYPOINT [ "/entrypoint.sh" ]
+CMD [ "emacs" ]

README.org

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+
+* Docker image for Emacs on Alpine Linux
+Docker image: [[https://hub.docker.com/repository/docker/neox101/emacs-image/builds][Docker Build]]
+
+Emacs from Alpine community repository with MELPA setting.
+
+- Alpine Linux v3.11
+- Emacs v26.3
+
+* How to use this image
+#+begin_src sh
+docker run -it iquiw/alpine-emacs
+#+end_src
+
+
+* Environment Variables
+
+** `EMACS_PACKAGES`
+
+This variable specifies space separated list of packages.
+They are installed automatically when the container is executed.
+
+
+* Favicon
+Get free favicon from:
+https://www.favicon.cc
+
+
+* Build on docker
+Go to : 
+and click on Trigger.
+
+* REF:
+https://github.com/iquiw/docker-alpine-emacs
+
+

entrypoint.sh

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+#! /bin/sh
+
+EMACS_DIR=$HOME/.emacs.d/
+EMACS_ELPA_DIR=$EMACS_DIR/elpa/
+EMACS_INIT_FILE=$EMACS_DIR/init.el
+
+echo "inside entry point."
+
+which git
+ls -lrt /usr/bin/
+ls -lrt /usr/share/
+# which emacs
+
+if [ "$1" = emacs -a ! -d "$EMACS_ELPA_DIR" -a -n "$EMACS_PACKAGES" ]; then
+	cat > /tmp/melpa.el <<EOF
+(require 'package)
+(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
+(package-initialize)
+EOF
+	emacs -batch -l /tmp/melpa.el -f package-refresh-contents
+	rm -f /tmp/melpa.el
+fi
+
+exec "$@"

init.el

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+
+;; this file is user-init-file
+(setq user-init-file (or load-file-name (buffer-file-name)))
+;; user-emacs-directory is defined in subr.el , which is same as this.
+(setq user-emacs-directory (file-name-directory user-init-file))
+
+
+(require 'package)
+
+(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
+
+(package-initialize)
+
+(let ((packages (getenv "EMACS_PACKAGES")))
+  (when packages
+    (dolist (package (split-string packages))
+      (add-to-list 'package-selected-packages (intern package)))))
+
+(package-install-selected-packages)
+(message "Hello")
+
+(eval-after-load "ox-html" (setq org-html-prefer-user-labels t))
+(message "Hello World")