Dockerfile

FROM node:latest as builder

ADD src src
WORKDIR src
RUN npm install && \
    npm run build

FROM node:alpine as runner

COPY src/package.json .
RUN apk update && \
    apk add --no-cache libc6-compat
COPY --from=builder /src/dist/convert.js /
COPY --from=builder /src/node_modules/sharp /node_modules/sharp
RUN npm install --only=production
CMD ["node", "convert.js"]

Dockerfile2

FROM node:alpine as builder

RUN apk update && \
    apk add --no-cache \
        libc6-compat \
        alpine-sdk

ADD src src
WORKDIR src
RUN npm install && \
    npm run build

FROM node:alpine as runner

COPY src/package.json .
RUN apk update && \
    apk add --no-cache libc6-compat
COPY --from=builder /src/dist/convert.js /
COPY --from=builder /src/node_modules/sharp /node_modules/sharp
RUN npm install --only=production
CMD ["node", "convert.js"]

gistfile1.txt

YoshikinoMBP% docker run -v `pwd`/work:/work --rm 51c9b6110c00
module.js:670
  return process.dlopen(module, path.toNamespacedPath(filename));
                 ^

Error: Error loading shared library /node_modules/sharp/build/Release/sharp.node: Exec format error
    at Object.Module._extensions..node (module.js:670:18)
    at Module.load (module.js:560:32)
    at tryModuleLoad (module.js:503:12)
    at Function.Module._load (module.js:495:3)
    at Module.require (module.js:585:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/node_modules/sharp/lib/constructor.js:9:15)
    at Module._compile (module.js:641:30)
    at Object.Module._extensions..js (module.js:652:10)
    at Module.load (module.js:560:32)