add files

Dockerfile

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+FROM ruby:2.4.4-alpine3.7
+
+ARG VERSION=v2.4.1
+ARG REPOSITORY=tootsuite/mastodon
+ARG LIBICONV_VERSION=1.15
+
+ENV UID=991 GID=991 \
+    RUN_DB_MIGRATIONS=true \
+    SIDEKIQ_WORKERS=5 \
+    RAILS_SERVE_STATIC_FILES=true \
+    RAILS_ENV=production \
+    NODE_ENV=production \
+    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/mastodon/bin
+
+WORKDIR /mastodon
+
+# Install dependencies
+RUN apk -U upgrade \
+ && apk add \
+    ca-certificates \
+    ffmpeg \
+    file \
+    git \
+    icu-libs \
+    imagemagick \
+    libidn \
+    libpq \
+    libressl \
+    nodejs-npm \
+    nodejs \
+    protobuf \
+    s6 \
+    su-exec \
+    tzdata \
+
+# Install build dependencies
+ && apk add -t build-dependencies \
+    build-base \
+    icu-dev \
+    libidn-dev \
+    libtool \
+    postgresql-dev \
+    protobuf-dev \
+    python \
+    tar \
+    yarn \
+
+# Update CA certificates
+ && update-ca-certificates \
+
+# Install GNU Libiconv
+ && wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-${LIBICONV_VERSION}.tar.gz -O /tmp/libiconv-${LIBICONV_VERSION}.tar.gz \
+ && mkdir /tmp/src && tar xzf /tmp/libiconv-${LIBICONV_VERSION}.tar.gz -C /tmp/src \
+ && cd /tmp/src/libiconv-${LIBICONV_VERSION} \
+ && ./configure --prefix=/usr/local \
+ && make -j$(getconf _NPROCESSORS_ONLN) && make install && libtool --finish /usr/local/lib \
+
+# Install Mastodon
+ && cd /mastodon \
+ && wget -qO- https://github.com/${REPOSITORY}/archive/${VERSION}.tar.gz | tar xz --strip 1 \
+ && bundle config build.nokogiri --with-iconv-lib=/usr/local/lib --with-iconv-include=/usr/local/include \
+ && bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --clean --no-cache --without test development \
+ && yarn --ignore-optional --pure-lockfile \
+
+# Precompile Mastodon assets
+ && SECRET_KEY_BASE=$(bundle exec rake secret) OTP_SECRET=$(bundle exec rake secret) SMTP_FROM_ADDRESS= bundle exec rake assets:precompile \
+
+# Clean
+ && npm -g --force cache clean && yarn cache clean \
+ && apk del build-dependencies \
+ && rm -rf /var/cache/apk/* /tmp/src
+
+COPY rootfs /
+
+RUN chmod +x /usr/local/bin/* /etc/s6.d/*/* /etc/s6.d/.s6-svscan/*
+
+VOLUME /mastodon/public/system /mastodon/log
+
+EXPOSE 3000 4000
+
+LABEL maintainer="Wonderfall <wonderfall@targaryen.house>" \
+      description="Your self-hosted, globally interconnected microblogging community"
+
+ENTRYPOINT ["/usr/local/bin/run"]
+CMD ["/bin/s6-svscan", "/etc/s6.d"]

README.md

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+## wonderfall/mastodon
+
+![Mastodon](https://github.com/tootsuite/mastodon/blob/master/app/javascript/images/mastodon-getting-started.png?raw=true)
+
+A GNU Social-compatible microblogging server : https://github.com/tootsuite/mastodon
+
+#### Why this image?
+This image is not the official one. The main difference you can notice is that all processes (web, streaming, sidekiq) are running in a single container, thanks to s6 (a supervision suite). Therefore it's easier to deploy, but not recommended for scaling.
+
+#### Features
+- Based on Alpine Linux.
+- As lightweight as possible. 
+- All-in-one container (s6).
+- Assets are precompiled.
+- Database migrations can be run at startup.
+- No root processes.
+
+#### Build-time variables
+- **VERSION** : version of Mastodon, can be `v1.4.1` or `master`. *(default : latest version)*
+- **REPOSITORY** : location of the code *(default : tootsuite/mastodon)*
+
+#### Environment variables you should change
+- **UID** : mastodon user id *(default : 991)*
+- **GID** : mastodon group id *(default : 991)*
+- **RUN_DB_MIGRATIONS** : run `rake db:migrate` at startup *(default : true)*
+- **SIDEKIQ_WORKERS** :  number of Sidekiq workers *(default : 5)*
+- Other environment variables : https://github.com/tootsuite/mastodon/blob/master/.env.production.sample
+
+#### Volumes
+- **/mastodon/public/system** : shit like media attachments, avatars, etc.
+- **/mastodon/public/assets** : Mastodon assets
+- **/mastodon/public/packs** : Mastodon assets
+- **/mastodon/log** : Mastodon logfiles (mount if you prefer to)
+
+#### Ports
+- **3000** : Mastodon web
+- **4000** : Mastodon streaming
+
+#### docker-compose sample
+
+```
+mastodon:
+  image: wonderfall/mastodon:stable
+  restart: always
+  container_name: mastodon
+  env_file: /home/docker/mastodon/.env.production
+  environment:
+    - WEB_CONCURRENCY=16
+    - MAX_THREADS=20
+    - SIDEKIQ_WORKERS=25
+    - RUN_DB_MIGRATIONS=true
+  links:
+    - mastodon-pgb
+    - mastodon-redis
+  volumes:
+    - /home/docker/mastodon/public/system:/mastodon/public/system
+    - /home/docker/mastodon/public/assets:/mastodon/public/assets
+    - /home/docker/mastodon/public/packs:/mastodon/public/packs
+```
+

rootfs/etc/s6.d/.s6-svscan/finish

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+#!/bin/sh
+exit 0

rootfs/etc/s6.d/sidekiq/run

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+#!/bin/sh
+cd /mastodon
+exec bundle exec sidekiq -c $SIDEKIQ_WORKERS -q default -q push -q pull -q mailers > ./log/sidekiq.log 2>&1

rootfs/etc/s6.d/streaming/run

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+#!/bin/sh
+cd /mastodon
+exec npm run start > ./log/streaming.log 2>&1

rootfs/etc/s6.d/web/run

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+#!/bin/sh
+cd /mastodon
+exec bundle exec puma -C config/puma.rb > ./log/web.log 2>&1

rootfs/usr/local/bin/run

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+#!/bin/sh
+
+### 1. Adds local user (UID and GID are provided from environment variables).
+### 2. Moves precompiled assets into them.
+### 3. Updates permissions, except for ./public/system (should be chown on previous installations).
+###    NOTE : this can take a long time if overlay2 is the storage-driver (issue #3194).
+### 4. If $RUN_DB_MIGRATIONS is set to true, runs the database migrations task.
+### 5. Executes the command as that user.
+
+echo "
+---------------------------------------------
+     _____         _         _
+    |     |___ ___| |_ ___ _| |___ ___
+    | | | | .'|_ -|  _| . | . | . |   |
+    |_|_|_|__,|___|_| |___|___|___|_|_|
+
+A GNU Social-compatible microblogging server
+   https://github.com/tootsuite/mastodon
+    17j2g7vpgHhLuXhN4bueZFCvdxxieyRVWd
+---------------------------------------------
+UID/GID settings
+---------------------------------------------
+User  ID : ${UID}
+Group ID : ${GID}
+---------------------------------------------
+Logs location
+---------------------------------------------
+Sidekiq   : /mastodon/log/sidekiq.log
+Streaming : /mastodon/log/streaming.log
+Web       : /mastodon/log/web.log
+---------------------------------------------
+"
+
+echo "Creating mastodon user..."
+addgroup -g ${GID} mastodon &>/dev/null
+adduser -h /mastodon -s /bin/sh -D -G mastodon -u ${UID} mastodon &>/dev/null
+
+echo "Updating permissions, this can take a while..."
+find /mastodon -path /mastodon/public/system -prune -o -not -user mastodon -not -group mastodon -print0 | xargs -0 chown -f mastodon:mastodon
+chown -R mastodon:mastodon /etc/s6.d
+
+if [ "$RUN_DB_MIGRATIONS" == "true" ]; then
+  echo "Running database migrations task..."
+  su-exec mastodon:mastodon bundle exec rake db:migrate
+fi
+
+echo "Executing process(es)..."
+if [ '$@' == '' ]; then
+    exec su-exec mastodon:mastodon /bin/s6-svscan /etc/s6.d
+else
+    exec su-exec mastodon:mastodon "$@"
+fi