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-rw-r--r--sw-server/Dockerfile6
1 files changed, 5 insertions, 1 deletions
diff --git a/sw-server/Dockerfile b/sw-server/Dockerfile
index 7c372052..740c2514 100644
--- a/sw-server/Dockerfile
+++ b/sw-server/Dockerfile
@@ -2,7 +2,11 @@ FROM openjdk:11-jre
EXPOSE 80
+# Heroku uses the PORT environment variable, it ignores EXPOSE.
+# This also allows to specify a custom port when running the container even outside of Heroku.
+ENV PORT 80
+
ARG JAR_FILE=build/libs/sw-server.jar
COPY ${JAR_FILE} app.jar
-ENTRYPOINT ["java", "-Dserver.port=80", "-jar", "/app.jar"]
+ENTRYPOINT ["java", "-Dserver.port=$PORT", "-jar", "/app.jar"]
bgstack15