use puma directly in Dockerfile

Dockerfile

@@ -1,19 +1,19 @@
-FROM ruby:alpine AS base
+ARG RUBY_VERSION="3.4.3"
+FROM ruby:${RUBY_VERSION} AS base
 
 WORKDIR /app
 
 RUN <<EOT
+  apt-get update
   gem update --system --no-document
   gem install -N bundler
-  apk update
-  apk upgrade --no-cache
 EOT
 
 
 FROM base AS build
 
 RUN <<EOT
-  apk add gcc musl-dev ruby-dev make
+  apt-get install --yes gcc make
 EOT
 
 COPY Gemfile* .
@@ -26,15 +26,17 @@ EOT
 
 FROM base
 
-# RUN useradd ruby --home /app --shell /bin/sh
-RUN adduser ruby -h /app -D
+ENV PORT=4567
 
-USER ruby:ruby
+# RUN useradd ruby --home /app --shell /bin/sh
+RUN useradd --home /app --create-home app
+
+USER app:app
 
 COPY --from=build /usr/local/bundle /usr/local/bundle
-COPY --from=build --chown=ruby:ruby /app /app
+COPY --from=build --chown=app:app /app /app
 
-COPY --chown=ruby:ruby . .
+COPY --chown=app:app . .
 
 EXPOSE 4567
-CMD [ "bundle", "exec", "rackup", "--host", "0.0.0.0", "--port", "4567" ]
+CMD [ "puma", "--bind", "0.0.0.0", "--port", "$PORT" ]

Gemfile.lock

@@ -5,7 +5,7 @@ GEM
     ast (2.4.3)
     base64 (0.2.0)
     bigdecimal (3.1.9)
-    csv (3.3.3)
+    csv (3.3.4)
     diff-lcs (1.6.1)
     httparty (0.23.1)
       csv
@@ -27,15 +27,15 @@ GEM
       ruby2_keywords (~> 0.0.1)
     nanoid (2.0.0)
     nio4r (2.7.4)
-    parallel (1.26.3)
-    parser (3.3.7.4)
+    parallel (1.27.0)
+    parser (3.3.8.0)
       ast (~> 2.4.1)
       racc
     prism (1.4.0)
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.12)
+    rack (3.1.13)
     rack-protection (4.1.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
@@ -65,7 +65,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.2)
-    rubocop (1.73.2)
+    rubocop (1.75.2)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -73,17 +73,17 @@ GEM
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.38.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.43.0)
+    rubocop-ast (1.44.1)
       parser (>= 3.3.7.2)
       prism (~> 1.4)
-    rubocop-performance (1.24.0)
+    rubocop-performance (1.25.0)
       lint_roller (~> 1.1)
-      rubocop (>= 1.72.1, < 2.0)
+      rubocop (>= 1.75.0, < 2.0)
       rubocop-ast (>= 1.38.0, < 2.0)
-    ruby-lsp (0.23.13)
+    ruby-lsp (0.23.14)
       language_server-protocol (~> 3.17.0)
       prism (>= 1.2, < 2.0)
       rbs (>= 3, < 4)
@@ -103,19 +103,19 @@ GEM
       rack-protection (= 4.1.1)
       sinatra (= 4.1.1)
       tilt (~> 2.0)
-    sorbet-runtime (0.5.11971)
-    standard (1.47.0)
+    sorbet-runtime (0.5.12026)
+    standard (1.49.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
-      rubocop (~> 1.73.0)
+      rubocop (~> 1.75.2)
       standard-custom (~> 1.0.0)
-      standard-performance (~> 1.7)
+      standard-performance (~> 1.8)
     standard-custom (1.0.2)
       lint_roller (~> 1.0)
       rubocop (~> 1.50)
-    standard-performance (1.7.0)
+    standard-performance (1.8.0)
       lint_roller (~> 1.1)
-      rubocop-performance (~> 1.24.0)
+      rubocop-performance (~> 1.25.0)
     tilt (2.6.0)
     ulid (1.4.0)
     unicode-display_width (3.1.4)
@@ -149,4 +149,4 @@ DEPENDENCIES
   uuid7
 
 BUNDLED WITH
-   2.6.6
+   2.6.8