feat(elixir): add docker deployment

.dockerignore

@@ -0,0 +1,48 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+components_elixir-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
+
+# If NPM crashes, it generates a log, let's ignore it too.
+npm-debug.log
+
+# The directory NPM downloads your dependencies sources to.
+/assets/node_modules/
+
+# Since we are building assets from assets/,
+# we ignore priv/static. You may want to comment
+# this depending on your deployment strategy.
+/priv/static/
+
+# Files matching config/*.secret.exs pattern contains 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/*.secret.exs
+
+.elixir_ls/
+.DS_Store