Adds a release build script

.dockerignore

@@ -2,4 +2,7 @@
 LICENSE
 Dockerfile
 spec/
-bin/
+bin/
+Makefile
+.dockerignore
+*.Dockerfile

Makefile

@@ -0,0 +1,10 @@
+mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
+current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path))))
+
+release:
+	# Build a static binary and save it in muse-dl-static
+	docker build --tag muse-dl-static --file static.Dockerfile .
+	# Then extract the image | extract the layer.tar file (we only have one layer) | extract the muse-dl-static file
+	docker image save muse-dl-static | tar xf - --wildcards "*/layer.tar" -O | tar xf - "muse-dl-static"
+	# And move it to the bin/ directory
+	mv -f muse-dl-static bin/

static.Dockerfile

@@ -9,4 +9,4 @@ RUN shards install && \
 
 FROM scratch
 
-COPY --from=builder /build/bin/muse-dl /muse-dl
+COPY --from=builder /build/bin/muse-dl /muse-dl-static