added docker support

.dockerignore

@@ -0,0 +1,22 @@
+# App artifacts
+/_build
+/db
+/deps
+/*.ez
+
+# Generated on crash by the VM
+erl_crash.dump
+
+# Files matching config/*.secret.exs pattern contain sensitive
+# data and you should not commit them into version control.
+#
+# Alternatively, you may comment the line below and commit the
+# secrets files as long as you replace their contents by environment
+# variables.
+/config/dev.secret.exs
+/config/*.secret.json
+
+uploads
+
+/priv/static/*
+/client/node_modules