update dockerfile to run npm install only if package.json is changed

frontend/Dockerfile

@@ -5,11 +5,11 @@ WORKDIR /app
 COPY ./package.json ./
 COPY ./bun.lockb ./
 
+RUN npm install
+
 COPY . .
 # COPY ./.env.example ./.env
 
-RUN npm install
-
 ARG DATABASE_URL
 
 RUN DATABASE_URL=$DATABASE_URL npm run db:migrate

frontend/static/googled263903462c1d2c5.html

@@ -0,0 +1 @@
+google-site-verification: googled263903462c1d2c5.html