docker image size reduced from 1.61gb to 1.57 gb (#1099)

* Added dockerignore file for reducing the docker image size

* reduced docker image size by adding .dockerignore file

.dockerignore

@@ -0,0 +1,36 @@
+.dockerignore
+.git
+.gitignore
+.make
+*.log
+/*.md
+dist
+docker-compose*.yml
+Dockerfile
+docs
+Makefile
+tmp
+node_modules
+.rubocop.yml
+.travis.yml
+.sass-cache
+.idea/
+DS_Store
+coverage/
+coverage_report/
+.byebug_history
+coverage_report/
+test/reports/
+/.bundle
+*.swp
+*.swo
+log/
+todo.txt
+.sass-cache
+.byebug_history
+coverage_report/
+test/reports/
+yarn-error.log
+.idea/
+
+