chore: refactor Dockerfile making images more size efficient (#236)

Dockerfile

@@ -1,67 +1,43 @@
-FROM alpine:3.16.0
-LABEL maintainer="Miraculous Owonubi <[email protected]>" \
-  name="freyrcli" \
-  version="latest" \
-  tag="alpine"
+FROM node:alpine as installer
+
+RUN printf '#!/usr/bin/env sh\necho "Python 3.0.0"\n' > /usr/bin/python && chmod +x /usr/bin/python
+# ^-- Workaround to bypass youtube-dl-exec's postinstall check for a supported python installation
+COPY . /freyr
+WORKDIR /freyr
+RUN npm ci --only=production
+
+FROM golang:alpine as prep
 
-# Install dependencies and clean cache
 # hadolint ignore=DL3018
-RUN apk add \
-  --no-cache \
-  git \
-  libstdc++ \
-  npm \
-  nodejs \
-  python3 \
-  ffmpeg \
-  bash \
-  which \
-  cmake \
-  gcc \
-  g++ \
-  make \
-  linux-headers \
-  && ln /usr/bin/python3 /usr/bin/python \
-  && find /usr/lib/python3* -type d -name __pycache__ -exec rm -r {} \+
+RUN apk add --no-cache git g++ make cmake linux-headers
+COPY --from=installer /freyr/node_modules /freyr/node_modules
+RUN go install github.com/tj/node-prune@1159d4c \
+  && node-prune /freyr/node_modules \
+  && git clone --branch 20210715.151551.e7ad03a --depth 1 https://github.com/wez/atomicparsley /atomicparsley \
+  && cmake -S /atomicparsley -B /atomicparsley \
+  && cmake --build /atomicparsley --config Release
 
-# install atomicparsley
-RUN mkdir /bins \
-  && git clone --branch 20210715.151551.e7ad03a --depth 1 https://github.com/wez/atomicparsley \
-  && cmake -S atomicparsley -B atomicparsley \
-  && cmake --build atomicparsley --config Release \
-  && mv atomicparsley/AtomicParsley /bins \
-  && rm -r atomicparsley
-ENV PATH "/bins:$PATH"
+FROM alpine:3.16.0 as base
+
+# hadolint ignore=DL3018
+RUN apk add --no-cache nodejs ffmpeg python3 libstdc++
+COPY --from=installer /freyr /freyr
+RUN rm -rf /freyr/node_modules
+COPY --from=prep /freyr/node_modules /freyr/node_modules
+COPY --from=prep /atomicparsley/AtomicParsley /bin/AtomicParsley
 
-# Create freyr user and group
 # hadolint ignore=DL4006
-RUN addgroup -g 1000 freyr \
+RUN addgroup -g 1001 freyr \
   && adduser -DG freyr freyr \
-  && echo freyr:freyr | chpasswd
-
-# Stage and install freyr
-COPY . /freyr
-WORKDIR /freyr
-RUN npm ci \
-  && npm link \
-  && npm cache clean --force \
+  && echo freyr:freyr | chpasswd \
+  && ln -s /freyr/cli.js /bin/freyr \
   && mkdir /data \
   && chown -R freyr:freyr /freyr /data
-
-# Set and mount workdir
+WORKDIR /freyr
 USER freyr
+
 WORKDIR /data
 VOLUME /data
 
-# Set entrypoint and default cmd
 ENTRYPOINT ["freyr"]
 CMD ["--help"]
-
-# BUILD
-# > git clone https://github.com/miraclx/freyr-js freyr
-# > docker build -t freyr:alpine freyr
-
-# LAUNCH (freyr)
-# > docker run --rm -v $PWD:/data freyr:alpine
-# LAUNCH (bash)
-# > docker run -itv $PWD:/data --entrypoint bash freyr:alpine