Dockerfile, nginx.conf: add configuration for vcard file type

Dockerfile

@@ -12,3 +12,4 @@ RUN jekyll build
 
 FROM nginx
 COPY --from=builder /home/_site /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf

nginx.conf

@@ -0,0 +1,21 @@
+# vim:set et sw=4 ts=4:
+
+server {
+    listen 80;
+    server_name localhost;
+
+    location / {
+        root /usr/share/nginx/html;
+        index index.html index.htm;
+    }
+
+    error_page 500 502 503 504 /50x.html;
+    location = /50x.html {
+        root /usr/share/nginx/html;
+    }
+
+    location ~* \.vcf$ {
+        default_type text/vcard;
+        root /usr/share/nginx/html;
+    }
+}