create abc-toolbox docker image

dockerfiles/tasks/abc-toolbox/Dockerfile

@@ -0,0 +1,15 @@
+#FROM ubuntu:21.04
+#RUN apt-get update && ap-get install build-essential
+FROM alpine/git
+RUN apk add --update alpine-sdk
+
+RUN mkdir -p /project
+WORKDIR /project
+RUN git clone https://git.xai-corp.net/richard/abcmidi.git /project
+
+RUN make all install
+
+WORKDIR /
+
+COPY entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]