feat(telemetry): add zetaclientd :8123/version endpoint (#636)

* refactor: rename bitcoin RPCEndpoint to RPCHost

to make it less confusing. btcd library expects IP:PORT
or HOSTNAME:PORT as the RPCHost format.

* chore: remove .git from dockerignore file

as the build rule in Makefile uses .git/ to find tags and
generate version string.

* zetaclient: add :8123/version endpoint

---------

Co-authored-by: brewmaster012 <>

.dockerignore

@@ -1,6 +1,5 @@
 localnet
 package.json
 yarn.lock
-.git/
 .github/
 .gitignore

zetaclient/tss_http.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"github.com/zeta-chain/zetacore/common"
 	"net/http"
 	"time"
 
@@ -40,6 +41,7 @@ func (t *HTTPServer) Handlers() http.Handler {
 	router := mux.NewRouter()
 	router.Handle("/ping", http.HandlerFunc(t.pingHandler)).Methods(http.MethodGet)
 	router.Handle("/p2p", http.HandlerFunc(t.p2pHandler)).Methods(http.MethodGet)
+	router.Handle("/version", http.HandlerFunc(t.versionHandler)).Methods(http.MethodGet)
 	//router.Handle("/pending", http.HandlerFunc(t.pendingHandler)).Methods(http.MethodGet)
 	router.Use(logMiddleware())
 	return router
@@ -90,3 +92,8 @@ func (t *HTTPServer) p2pHandler(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(http.StatusOK)
 	fmt.Fprintf(w, "%s", t.p2pid)
 }
+
+func (t *HTTPServer) versionHandler(w http.ResponseWriter, _ *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	fmt.Fprintf(w, "%s", common.Version)
+}