Update laravel demo

Signed-off-by: Kang Huaishuai <khs1994@khs1994.com>

Author: khs1994

image/multistage-builds/example/laravel/Dockerfile

@@ -5,7 +5,7 @@ COPY package.json /app/
 RUN set -x ; cd /app \
       && npm install --registry=https://registry.npm.taobao.org
 
-COPY webpack.mix.js /app/
+COPY webpack.mix.js webpack.config.js tailwind.config.js /app/
 COPY resources/ /app/resources/
 
 RUN set -x ; cd /app \

image/multistage-builds/laravel.md

@@ -63,7 +63,7 @@ COPY package.json /app/
 RUN set -x ; cd /app \
       && npm install --registry=https://registry.npm.taobao.org
 
-COPY webpack.mix.js /app/
+COPY webpack.mix.js webpack.config.js tailwind.config.js /app/
 COPY resources/ /app/resources/
 
 RUN set -x ; cd /app \
@@ -181,7 +181,7 @@ COPY package.json /app/
 RUN set -x ; cd /app \
       && npm install --registry=https://registry.npm.taobao.org
 
-COPY webpack.mix.js /app/
+COPY webpack.mix.js webpack.config.js tailwind.config.js /app/
 COPY resources/ /app/resources/
 
 RUN set -x ; cd /app \