feat: add shared dir for docker image and nginx config

build/Containerfile

@@ -0,0 +1,5 @@
+FROM nginx:mainline-alpine as nginx
+
+COPY ./build/nginx/site.conf /etc/nginx/conf.d/default.conf
+
+COPY ./out /var/www/html

build/nginx/site.conf

@@ -0,0 +1,15 @@
+server {
+    listen 80;
+
+    location /security.txt {
+      return 308 /.well-known/security.txt;
+    }
+
+    location / {
+        root   /var/www/html;
+        index  index.html index.htm;
+    }
+
+    error_page 404              /404.html;
+    #error_page 500 502 503 504  /50x.html;
+}