Added cloud build config for merkle (#53)

Adds presubmit checks consistent with the other repos.

.golangci.yaml

@@ -3,30 +3,9 @@ run:
   deadline: 90s
 
 linters-settings:
-  gocyclo:
-    # minimal code complexity to report, 30 by default (but we recommend 10-20)
-    min-complexity: 25
   depguard:
     list-type: blacklist
     packages:
       - golang.org/x/net/context
       - github.com/gogo/protobuf/proto
 
-linters:
-  disable-all: true
-  enable:
-    - deadcode
-    - depguard
-    - gocyclo
-    - gofmt
-    - goimports
-    - govet
-    - ineffassign
-    - megacheck
-    - misspell
-    - revive
-    - varcheck
-
-issues:
-  # Don't turn off any checks by default. We can do this explicitly if needed.
-  exclude-use-default: false

cloudbuild.yaml

@@ -0,0 +1,26 @@
+timeout: 300s
+options:
+  machineType: E2_HIGHCPU_32
+  volumes:
+  - name: go-modules
+    path: /go
+  env:
+  - GOPROXY=https://proxy.golang.org
+  - PROJECT_ROOT=github.com/transparency-dev/merkle
+  - GOPATH=/go
+
+# Cloud Build logs sent to GCS bucket
+logsBucket: 'gs://trillian-cloudbuild-logs'
+
+steps:
+- id: 'lint'
+  name: "golangci/golangci-lint:v1.51"
+  args: ["golangci-lint", "run", "--timeout", "10m"]
+
+- id: 'unit tests'
+  name: 'golang:1.19'
+  args: ['go', 'test', './...']
+
+- id: 'build'
+  name: 'golang:1.19'
+  args: ['go', 'build', './...']