Fix OTP_VERSION file in docker

diff --git a/Dockerfile b/Dockerfile
index 29931a5e3a398cd2fef9cb0e244da7db5725ce1f..c2f3ad98c9a3478a360ff836c2ab219ab4eadc73 100644 (file)
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,6 +12,8 @@ RUN apk add git gcc g++ musl-dev make &&\
        mkdir release &&\
        mix release --path release
 
+RUN echo "${OTP_VERSION}" > release/OTP_VERSION
+
 FROM alpine:3.11
 
 ARG BUILD_DATE