diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..612eccc
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,6 @@
+FROM python:3-alpine3.20
+
+WORKDIR /opt/server
+
+COPY . .
+RUN pip install -r requirements.txt
diff --git a/app.py b/app.py
index 1bd4397..246eed5 100644
--- a/app.py
+++ b/app.py
@@ -1,9 +1,29 @@
+import psycopg2
+from generate import on_load
 from fastapi import FastAPI, Response
 from routes.auth import router as auth
+from contextlib import asynccontextmanager
+from util.config import conn_param, db_url
 from routes.balance import router as balance
 from fastapi.middleware.cors import CORSMiddleware
 
-app = FastAPI()
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+	conn = psycopg2.connect(conn_param)
+	cur = conn.cursor()
+
+	try:
+		print("loading database for: %s" % db_url())
+		on_load(conn, cur)
+	except:
+		print("[warn] error occurred while creating table. aborted")
+	finally:
+		cur.close()
+		conn.close()
+
+	yield
+
+app = FastAPI(lifespan=lifespan)
 
 app.add_middleware(
 	CORSMiddleware,
@@ -14,7 +34,7 @@ app.add_middleware(
 )
 
 @app.get("/")
-def index(resp: Response):
+async def index(resp: Response):
 	resp.headers.setdefault("Content-Type", "text")
 	return "Hello, World!"
 
diff --git a/generate.py b/generate.py
index b35ccfd..6c164a9 100644
--- a/generate.py
+++ b/generate.py
@@ -1,8 +1,6 @@
-import psycopg2
 import random, string
 from getpass import getpass
 from util.auth_lib import hash
-from util.config import conn_param
 from service.auth_service import AuthData, AuthService
 
 def gen_salt(length = 20):
@@ -18,77 +16,56 @@ def _gen_token():
 
 	sec.close()
 
-def __main__():
-	conn = psycopg2.connect(conn_param)
-	cur = conn.cursor()
+def _new_account():
+	name = input("input your display name: ")
+	username = input("input your username: ")
+	password = getpass("input your password: ")
+	passchk = getpass("type password one more time: ")
+	salt = gen_salt()
 
-	try:
-		f = open("./load.txt", "r")
-		_gen_token()
-		if f.read().split("=")[1] == "false":
-			raise ValueError("value not true")
-
-		print("server already initialized")
-		f.close()
-	except: 
-		cur.execute(
-			"""
-			create table if not exists account(
-				name varchar(25),
-				username varchar(25) not null,
-				password varchar(100) not null,
-				salt varchar(50),
-				primary key(username)
-			);
-			"""
-		)
-
-		cur.execute(
-			"""
-			create table if not exists balset(
-				id serial primary key,
-				uid varchar(25) not null,
-				name varchar(50),
-				date bigint,
-				price bigint,
-				buy boolean,
-				memo varchar(300),
-				constraint FK_Account_ID
-					foreign key (uid)
-					references account(username)
-					on delete CASCADE
-			);
-			"""
-		)
-
-		conn.commit()
-
-		cur.close()
-		conn.close()
-
-		name = input("input your display name: ")
-		username = input("input your username: ")
-		password = getpass("input your password: ")
-		passchk = getpass("type password one more time: ")
-		salt = gen_salt()
-
-		if password != passchk:
-			return
+	if password != passchk:
+		return
 		
-		hashed_password = hash(password, salt)
-		packed = AuthData(
-			name=name,
-			username=username,
-			password=hashed_password,
-			salt=salt
-		)
+	hashed_password = hash(password, salt)
+	packed = AuthData(
+		name=name,
+		username=username,
+		password=hashed_password,
+		salt=salt
+	)
 
-		service = AuthService()
-		service.create(data=packed)
+	service = AuthService()
+	service.create(data=packed)
 
-		f = open("load.txt", "w")
-		f.write("init=true")
-
-		f.close()
-
-__main__()
+def on_load(conn, cur):
+	_gen_token()
+	cur.execute(
+		"""
+		create table account(
+			name varchar(25),
+			username varchar(25) not null,
+			password varchar(100) not null,
+			salt varchar(50),
+			primary key(username)
+		);
+		"""
+	)
+	cur.execute(
+		"""
+		create table balset(
+			id serial primary key,
+			uid varchar(25) not null,
+			name varchar(50),
+			date bigint,
+			price bigint,
+			buy boolean,
+			memo varchar(300),
+			constraint FK_Account_ID
+				foreign key (uid)
+				references account(username)
+				on delete CASCADE
+		);
+		"""
+	)
+	conn.commit()
+	_new_account()
diff --git a/util/config.py b/util/config.py
index 19f0e5f..ecd25ee 100644
--- a/util/config.py
+++ b/util/config.py
@@ -11,6 +11,9 @@ def _load_secret():
 	
 	return tok
 
+def db_url():
+	return os.getenv("DB_URL")
+
 conn_param = "host=%s port=%s dbname=%s user=%s password=%s" % (
 	os.getenv("DB_URL"),
 	os.getenv("DB_PORT"),