APK ERROR: Service 'backend' failed to build : Build failed

[Kyle Crockett]

Error when building nginx-golang-postgres

Error response from daemon: dockerfile parse error line 25: unknown instruction: APK
ERROR: Service 'backend' failed to build : Build failed

It appears to be failing to run this command:

RUN <<EOF
apk update
apk add git
EOF

[Kyle Crockett]

Modifying to

RUN apk update
RUN apk add git

solved the issue.