Update docker go version and github actions (#372)

Signed-off-by: Jake Sanders <jsand@google.com>

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
       - uses: actions/checkout@v2.3.4
       - uses: sigstore/cosign-installer@main
         with:
-          cosign-release: 'v0.5.0'
+          cosign-release: 'v0.6.0'
       - name: Extract version of Go to use
         run: echo "GOVERSION=$(cat Dockerfile|grep golang | awk ' { print $2 } ' | sed -r 's/^.*://g'| uniq)" >> $GITHUB_ENV
       - uses: actions/setup-go@v2

.github/workflows/verify.yml

@@ -47,5 +47,4 @@ jobs:
         uses: golangci/golangci-lint-action@v2.5.2
         timeout-minutes: 5
         with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.39
+          version: latest

Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.16.5 AS builder
+FROM golang:1.16.6 AS builder
 ENV APP_ROOT=/opt/app-root
 ENV GOPATH=$APP_ROOT
 
@@ -30,7 +30,7 @@ RUN go build -ldflags "${SERVER_LDFLAGS}" ./cmd/rekor-server
 RUN CGO_ENABLED=0 go build -gcflags "all=-N -l" -ldflags "${SERVER_LDFLAGS}" -o rekor-server_debug ./cmd/rekor-server
 
 # Multi-Stage production build
-FROM golang:1.16.5 as deploy
+FROM golang:1.16.6 as deploy
 
 # Retrieve the binary from the previous stage
 COPY --from=builder /opt/app-root/src/rekor-server /usr/local/bin/rekor-server