make docker image more suitable for ci

Dockerfile

@@ -6,8 +6,7 @@ RUN make get
 RUN make build
 
 FROM alpine:latest
-RUN apk --no-cache add ca-certificates bash
+RUN apk --no-cache add ca-certificates bash git
 COPY --from=0 /go/src/github.com/kovetskiy/mark/mark /bin/
 RUN mkdir -p /docs
 WORKDIR /docs
-ENTRYPOINT ["/bin/mark"]

README.md

@@ -251,6 +251,7 @@ Apply:
           echo "> Uploading ${file}";
           docker run --rm -i -v=$(pwd):/docs
               kovetskiy/mark:latest
+                  mark
                   -u $DOCS_WIKI_USERNAME
                   -p $DOCS_WIKI_PASSWORD
                   -b $DOCS_WIKI_BASE_URL