internal/worker: add health check endpoint

This will be used with GKE health checks. The health checks
hit "/" by default, which causes unnecessary work.

Change-Id: I6093e5985102153bbabeb19feebbae1a44d55a9f
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/254378
Reviewed-by: Julie Qiu <julie@golang.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/internal/database/database.go b/internal/database/database.go
index fa82e6ce..bff5b08c 100644
--- a/internal/database/database.go
+++ b/internal/database/database.go
@@ -55,6 +55,10 @@ func New(db *sql.DB, instanceID string) *DB {
 	return &DB{db: db, instanceID: instanceID}
 }
 
+func (db *DB) Ping() error {
+	return db.db.Ping()
+}
+
 func (db *DB) InTransaction() bool {
 	return db.tx != nil
 }