sbt 1.4.1 (#17)

* sbt 1.4.1

* Run sbt from temporary working directory rather than root

We were running into https://github.com/sbt/sbt/issues/1458

Co-authored-by: Jeff Klukas <jeff@klukas.net>

Dockerfile

@@ -4,13 +4,17 @@
 ARG OPENJDK_TAG=8u232
 FROM openjdk:${OPENJDK_TAG}
 
-ARG SBT_VERSION=1.3.13
+ARG SBT_VERSION=1.4.1
 
 # Install sbt
 RUN \
+  mkdir /working/ && \
+  cd /working/ && \
   curl -L -o sbt-$SBT_VERSION.deb https://dl.bintray.com/sbt/debian/sbt-$SBT_VERSION.deb && \
   dpkg -i sbt-$SBT_VERSION.deb && \
   rm sbt-$SBT_VERSION.deb && \
   apt-get update && \
   apt-get install sbt && \
+  cd && \
+  rm -r /working/ && \
   sbt sbtVersion

README.md

@@ -28,7 +28,7 @@ local caches as volumes and set the working directory as well:
 To build, you need to specify the desired openjdk and sbt versions via
 `--build-arg` parameters:
 
-    docker build --build-arg OPENJDK_TAG=8u232 --build-arg SBT_VERSION=1.3.13 .
+    docker build --build-arg OPENJDK_TAG=8u232 --build-arg SBT_VERSION=1.4.1 .
 
 ## Pushing a new tag to DockerHub
 
@@ -42,7 +42,7 @@ Then use the following recipe to build and push:
 
 ```bash
 OPENJDK_TAG=8u232
-SBT_VERSION=1.3.13
+SBT_VERSION=1.4.1
 
 docker build \
     --build-arg OPENJDK_TAG=$OPENJDK_TAG \