Merge pull request #1485 from zh794390558/server_install

[server] more install 

setup.py

@@ -29,8 +29,7 @@ HERE = Path(os.path.abspath(os.path.dirname(__file__)))
 
 VERSION = '0.1.1'
 
-requirements = {
-    "install": [
+base = [
     "editdistance",
     "g2p_en",
     "g2pM",
@@ -63,10 +62,17 @@ requirements = {
     "visualdl",
     "webrtcvad",
     "yacs~=0.1.8",
-        # fastapi server
+]
+
+server = [
     "fastapi",
     "uvicorn",
-    ],
+    "pattern_singleton",
+]
+
+requirements = {
+    "install":
+    base + server,
     "develop": [
         "ConfigArgParse",
         "coverage",