simplify dockerfiles and remove duplication (#12419)

also add additional packages such as 'iproute',
'iputils' for `ping` and `ip addr` commands.

browser/.dockerignore

@@ -0,0 +1,18 @@
+**/*.swp
+cover.out
+*~
+minio
+!*/
+site/
+**/*.test
+**/*.sublime-workspace
+/.idea/
+/Minio.iml
+**/access.log
+build
+vendor/**/*.js
+vendor/**/*.json
+.DS_Store
+*.syso
+coverage.txt
+node_modules