Modify Dockerfile with suggested changes

docker/Dockerfile

@@ -1,27 +1,65 @@
-FROM node:lts-alpine
+FROM alpine:latest
 
-ENV NODE_ENV production
+LABEL description="Armadietto NodeJS web service (a RemoteStorageJS backend)"
 
-RUN mkdir /opt/armadietto
-RUN mkdir -m 0700 /usr/share/armadietto
-RUN adduser -u 6582 -HD armadietto
-RUN chown armadietto /usr/share/armadietto
+ARG CONFIG_PATH_STORAGE="/usr/share/armadietto"
+ARG PROJECT_NAME="armadietto"
+ARG PORT="8000"
+ARG USER="armadietto"
+ARG PKG_MANAGER="yarn"
+ARG INSTALL_COMMAND="yarn global --cache-folder /dev/shm/yarn-cache add"
 
-WORKDIR /opt/armadietto
+ENV NODE_ENV production
+ENV PROJECT_NAME=$PROJECT_NAME
 
-COPY package.json ./
-COPY package-lock.json ./
+RUN apk add nodejs $PKG_MANAGER
+RUN mkdir -m 0700 $CONFIG_PATH_STORAGE
+RUN adduser -u 6582 -HD $PROJECT_NAME
+RUN chown $PROJECT_NAME $CONFIG_PATH_STORAGE
 
-RUN npm i --production
+RUN $INSTALL_COMMAND $PROJECT_NAME
 
-COPY README.md ./
-COPY bin/ bin/
-COPY lib/ lib/
 COPY docker/config.json /etc/armadietto.conf.json
-RUN ln -s /opt/armadietto/bin/armadietto.js /usr/local/bin/armadietto
 
-VOLUME [ "/usr/share/armadietto" ]
-EXPOSE 8000
-USER armadietto
+VOLUME $CONFIG_PATH_STORAGE
+EXPOSE $PORT
+USER $PROJECT_NAME
+
+CMD $PROJECT_NAME -c /etc/armadietto.conf.json
+
+HEALTHCHECK CMD curl --fail http://127.0.0.1:$PORT/ || exit 1
 
-CMD [ "armadietto", "-c", "/etc/armadietto.conf.json" ]
+### Install ###
+#
+# BUILD:
+#
+# default for amd64 architecture
+#
+# > docker build -t armadietto:latest .
+# > docker build -t --build-arg PKG_MANAGER="npm" --build-arg INSTALL_COMMAND="npm i -g" armadietto:latest .
+#
+# RUN:
+#
+# > docker run --rm -p 8000:8000 rarmadietto:latest
+#
+# INFO: config.json needs to be byside the Dockerfile
+#
+# {
+#   "allow_signup": true,
+#   "storage_path": "/usr/share/armadietto",
+#   "cache_views": true,
+#   "http": {
+#     "host": "0.0.0.0",
+#     "port": 8000
+#   },
+#   "https": {
+#     "enable": false,
+#     "force": false,
+#     "port": 4443,
+#     "cert": "/etc/letsencrypt/live/example.com/cert.pem",
+#     "key": "/etc/letsencrypt/live/example.com/privkey.pem"
+#   },
+#   "basePath": ""
+# }
+#
+###