diff --git a/Dockerfile b/Dockerfile
index 78a3587..3b53002 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,14 @@
+# syntax=docker/dockerfile:1
+
+###
 FROM elixir:1.13.4-alpine AS builder
 
+#
+ARG MIX_ENV=prod
+ENV MIX_ENV=${MIX_ENV}
+
+ARG PORT
+
 WORKDIR /app
 
 COPY mix.exs .
@@ -13,14 +22,17 @@ RUN mix deps.get
 COPY lib/ ./lib/
 COPY config/ ./config/
 
-ENV MIX_ENV=prod
 RUN mix release
 
+###
 FROM elixir:1.13.4-alpine
 
+#
+ARG MIX_ENV=prod
+ENV MIX_ENV=${MIX_ENV}
+
 WORKDIR /app
 
-COPY --from=builder /app/_build/prod/rel/prod/ ./_build/prod/rel/prod/
+COPY --from=builder /app/_build/${MIX_ENV}/rel/prod/ ./_build/${MIX_ENV}/rel/prod/
 
-ENV MIX_ENV=prod
-CMD ["_build/prod/rel/prod/bin/prod", "start"]
+CMD ["sh", "-c", "_build/${MIX_ENV}/rel/prod/bin/prod start"]
diff --git a/compose.yml b/compose.yml
new file mode 100644
index 0000000..731ae9b
--- /dev/null
+++ b/compose.yml
@@ -0,0 +1,21 @@
+###
+services:
+  # docker buildx bake
+  srh:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      platforms:
+        - linux/amd64
+        - linux/arm64
+      args:
+        - MIX_ENV=${MIX_ENV:-runtime}
+        - PORT=${PORT:-80}
+    ports:
+      - '8079:${PORT:-80}'
+    image: local/serverless-redis-http
+    environment:
+      SRH_PORT: ${PORT:-80}
+      SRH_MODE: env
+      SRH_TOKEN: example_token
+      SRH_CONNECTION_STRING: 'redis://redis:6379'
\ No newline at end of file
diff --git a/config/runtime.exs b/config/runtime.exs
index c2d7a0c..dd50d8e 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -3,4 +3,4 @@ import Config
 config :srh,
   mode: System.get_env("TOKEN_RESOLUTION_MODE") || "file",
   file_path: System.get_env("TOKEN_RESOLUTION_FILE_PATH") || "srh-config/tokens.json",
-  port: Integer.parse(System.get_env("PORT") || "8080")
+  port: String.to_integer(System.get_env("PORT", "8080"))