added static build

Author: MariusDieckmann

.travis.yml

@@ -8,9 +8,9 @@ env:
 
 before_deploy:
   - mkdir -p release
-  - "GOOS=linux  GOARCH=amd64 go build -o release/datahandlercli-v$TRAVIS_TAG-linux-amd64"
-  - "GOOS=darwin GOARCH=amd64 go build -o release/datahandlercli-v$TRAVIS_TAG-darwin-amd64"
-  - "GOOS=windows GOARCH=amd64 go build -o release/datahandlercli-v$TRAVIS_TAG-windows-amd64"
+  - "GOOS=linux GOARCH=amd64 go build -a -ldflags '-w -extldflags \"-static\"' -o release/datahandlercli-v$TRAVIS_TAG-linux-amd64"
+  - "GOOS=darwin GOARCH=amd64 go build -a -ldflags '-w -extldflags \"-static\"' -o release/datahandlercli-v$TRAVIS_TAG-darwin-amd64"
+  - "GOOS=windows GOARCH=amd64 go build -a -ldflags '-w -extldflags \"-static\"' -o release/datahandlercli-v$TRAVIS_TAG-windows-amd64"
 
 deploy:
   provider: releases