FROM alpine:latest
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RUN apk add --no-cache crystal shards openssl openssl-dev musl-dev libc6-compat
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COPY . /opt/app/
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RUN cd /opt/app && \
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shards
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RUN cd /opt/app/ && crystal build --mcpu $(gcc -march=native -Q --help=target|grep march|awk '{print $2}'|head -n 1) --release src/sales_backend.cr
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CMD /opt/app/sales_backend
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