Add bazel build and release

Author: michaeljs1990

.gitignore

@@ -1,2 +1,3 @@
 config.yaml
 git-sync
+/release

BUILD.bazel

@@ -0,0 +1,34 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_binary(
+    name = "git-sync",
+    srcs = [
+        "main.go",
+        "schema.go",
+    ],
+    pure = "on",
+    visibility = ["//visibility:public"],
+    deps = [
+        "@com_github_google_go_github//github:go_default_library",
+        "@com_github_prometheus_client_golang//prometheus/promhttp:go_default_library",
+        "@com_github_santhosh_tekuri_jsonschema//:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+        "@in_gopkg_src_d_go_git_v4//:go_default_library",
+        "@in_gopkg_src_d_go_git_v4//config:go_default_library",
+        "@in_gopkg_src_d_go_git_v4//plumbing/format/config:go_default_library",
+        "@in_gopkg_src_d_go_git_v4//plumbing/transport:go_default_library",
+        "@in_gopkg_src_d_go_git_v4//plumbing/transport/http:go_default_library",
+        "@in_gopkg_src_d_go_git_v4//plumbing/transport/ssh:go_default_library",
+        "@in_gopkg_yaml_v2//:go_default_library",
+        "@org_golang_x_crypto//ssh:go_default_library",
+        "@org_golang_x_oauth2//:go_default_library",
+    ],
+    x_defs = {
+        "main.version": "{STABLE_GIT_TAG}",
+        "main.commit": "{STABLE_GIT_COMMIT}",
+    },
+)
+
+load("@bazel_gazelle//:def.bzl", "gazelle")
+
+gazelle(name = "gazelle")