diff --git a/.formatter.exs b/.formatter.exs
new file mode 100644
index 0000000..c0acf60
--- /dev/null
+++ b/.formatter.exs
@@ -0,0 +1,20 @@
+[
+  locals_without_parens: [
+    field: :*,
+    resolve: :*,
+    plug: :*,
+    arg: :*,
+    parse: :*,
+    serialize: :*,
+    value: :*,
+    has_one: :*,
+    has_many: :*,
+    from: :*,
+    get: :*,
+    post: :*,
+    put: :*,
+    belongs_to: :*
+  ],
+  inputs: ["lib/**/*.{ex,exs}", "test/**/*.{ex,exs}", "config/**/*.{ex,exs}"],
+  line_length: 120
+]
diff --git a/Dockerfile b/Dockerfile
index 2e86af3..d8c774b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,10 @@
-FROM prima/elixir-official:1.10.2-1
-
-WORKDIR /code
-
-RUN groupadd -g 1000 app && \
-    useradd -g 1000 -u 1000 --system --create-home app && \
-    mix local.hex --force && \
-    mix local.rebar --force && \
-    cp -rp /root/.mix /home/app/ && \
-    chown -R app:app /home/app/.mix
+FROM 001575623345.dkr.ecr.eu-west-1.amazonaws.com/elixir:1.10.2-1
 
+# Serve per avere l'owner dei file scritti dal container uguale all'utente Linux sull'host
 USER app
 
+WORKDIR /code
+
 COPY ["entrypoint", "/entrypoint"]
 
 ENTRYPOINT ["/entrypoint"]
diff --git a/mix.exs b/mix.exs
index 91050b8..3abebcf 100644
--- a/mix.exs
+++ b/mix.exs
@@ -9,6 +9,7 @@ defmodule OpentelemetryAbsinthe.MixProject do
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       package: package(),
+      aliases: aliases(),
       description: description()
     ]
   end
@@ -33,6 +34,14 @@ defmodule OpentelemetryAbsinthe.MixProject do
     ]
   end
 
+  defp aliases do
+    [
+      "format.all": [
+        "format mix.exs \"lib/**/*.{ex,exs}\" \"test/**/*.{ex,exs}\" \"priv/**/*.{ex,exs}\" \"config/**/*.{ex,exs}\""
+      ]
+    ]
+  end
+
   def package do
     [
       name: "opentelemetry_absinthe",