Include LICENSE files in image (#10)

This commit alters the 'build' target
to find all of the LICENSE files in
the source code and include them in a
/licenses directory inside the container
image. Inclusion of the license files may
be a requirement for some to distribute
the cloud-discovery container image.

.gitignore

@@ -1,2 +1,3 @@
 .idea/*
-cert*
+cert*
+licenses

Dockerfile

@@ -7,6 +7,8 @@ RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app cmd/server/ma
 
 FROM alpine:3.8
 RUN apk --no-cache add ca-certificates nmap
+WORKDIR /licenses
+COPY /licenses/* ./
 WORKDIR /root/
 COPY --from=0 /go/src/github.com/twistlock/cloud-discovery/app .
-CMD ["./app"]
+CMD ["./app"]

Makefile

@@ -1,4 +1,7 @@
 .PHONY: build
 
 build:
-	docker build -t twistlock/cloud-discovery .
+	# Find all of the open source LICENSE files in the source code and include them in a /licenses directory inside the container image.
+	# Inclusion of the license files may be a requirement for some to distribute the cloud-discovery container image.
+	rm -rf licenses; mkdir -p licenses; find . | grep LICENSE | while IFS= read -r pathname; do filename=$$(echo $$pathname | tr "\.\/" "_" | sed "s/^__//"); cp $$pathname licenses/$$filename; done
+	docker build -t twistlock/cloud-discovery .