Create Dockerfile

Dockerfile

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+# special thx to https://github.com/343dev
+# based on https://github.com/343dev/optimizt/issues/4
+
+FROM node:18.17.0-bullseye-slim
+
+WORKDIR /app
+
+ENV NODE_ENV="production"
+ENV SHELL="/bin/bash"
+
+RUN apt update \
+  && apt install --yes --no-install-recommends build-essential libpng16-16 libjpeg62-turbo libjpeg62-turbo-dev libpng-dev pkg-config dh-autoreconf \
+  && npm install --global @343dev/optimizt chokidar-cli \
+  && npm cache clean --force \
+  && apt purge --yes build-essential pkg-config libpng-dev libjpeg62-turbo-dev dh-autoreconf \
+  && apt autoremove --yes --purge \
+  && rm -rf /var/lib/apt/lists/* /usr/share/doc /usr/share/man
+
+WORKDIR /src
+
+CMD chokidar "/src/input/**/*" \
+  --command "if [ '{event}' = 'add' ]; then optimizt --verbose /src/input && mv /src/input/* /src/output; fi;" \
+  --polling \
+  --verbose