improving doc and build

Author: samber

.gitignore

@@ -12,3 +12,4 @@
 *.out
 
 sync-ssh-keys
+sync-ssh-keys_*

Dockerfile

@@ -1,6 +1,7 @@
 FROM golang:1.12-stretch AS builder
 
 ENV GO111MODULE=on
+ENV CGO_ENABLED=0
 
 # Download tools
 RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.17.1
@@ -14,6 +15,7 @@ RUN make deps
 COPY . .
 
 RUN make build
+
 # Copy binary to alpine
 FROM alpine:3.10
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt

Makefile

@@ -10,15 +10,15 @@ LDFLAGS=-ldflags "-X=main.Version=$(VERSION) -X=main.Build=$(BUILD_ID)"
 all: build
 
 build:
-	GO111MODULE=on go build -v $(LDFLAGS) -o $(BIN) $(SRC)
+	CGO_ENABLED=0 GO111MODULE=on go build -v $(LDFLAGS) -o $(BIN) $(SRC)
 
 docker-build:
 	docker build -t $(DOCKER_IMAGE):${VERSION} .
 
-release:
-	GOOS=linux GOARCH=arm64 GO111MODULE=on go build $(LDFLAGS) -o $(BIN)_$(VERSION)_linux-amd64 $(SRC)
-	GOOS=linux GOARCH=arm GO111MODULE=on go build $(LDFLAGS) -o $(BIN)_$(VERSION)_linux-arm $(SRC)
-	GOOS=freebsd GOARCH=386 GO111MODULE=on go build $(LDFLAGS) -o $(BIN)_$(VERSION)_freebsd-386 $(SRC)
+release: deps
+	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 GO111MODULE=on go build $(LDFLAGS) -o $(BIN)_$(VERSION)_linux-amd64 $(SRC)
+	CGO_ENABLED=0 GOOS=linux GOARCH=arm GO111MODULE=on go build $(LDFLAGS) -o $(BIN)_$(VERSION)_linux-arm $(SRC)
+	CGO_ENABLED=0 GOOS=freebsd GOARCH=386 GO111MODULE=on go build $(LDFLAGS) -o $(BIN)_$(VERSION)_freebsd-386 $(SRC)
 
 docker-release: docker-build
 	docker push $(DOCKER_IMAGE):${VERSION}

README.md

@@ -16,6 +16,13 @@ $ curl -o /usr/local/bin/sync-ssh-keys \
 $ chmod +x /usr/local/bin/sync-ssh-keys
 ```
 
+or 
+
+```bash
+$ docker pull samber/sync-ssh-keys:0.3.0
+$ docker run --rm samber/sync-ssh-keys:0.3.0 --github-username samber
+```
+
 ### Sync using a crontask
 
 ```bash
@@ -38,11 +45,14 @@ usage: sync-ssh-keys [<flags>]
 Flags:
       --help                   Show context-sensitive help (also try --help-long and --help-man).
 
+
   -o, --output=OUTPUT          Write output to <file>. Default to stdout
       --Werror=WERROR          Treat warning as errors. Fatal error if organization, team or user does not exist.
 
+
       --local-path=LOCAL-PATH  Path to a local authorized_keys file. It can be useful in case of network failure ;)
 
+
       --github-endpoint=GITHUB-ENDPOINT
                                Github Enterprise endpoint.
       --github-token=GITHUB-TOKEN
@@ -55,6 +65,7 @@ Flags:
       --exclude-github-username=EXCLUDE-GITHUB-USERNAME ...
                                Username(s) to explicitly exclude.
 
+
       --gitlab-endpoint=GITLAB-ENDPOINT
                                Gitlab endpoint.
       --gitlab-token=GITLAB-TOKEN
@@ -66,8 +77,8 @@ Flags:
       --exclude-gitlab-username=EXCLUDE-GITLAB-USERNAME ...
                                Username(s) to explicitly exclude.
 
-      --version                Show application version.
 
+      --version                Show application version.
 ```
 
 ### Simple user