Bump dockerfile-rails from 1.6.17 to 1.6.19

Bumps [dockerfile-rails](https://github.com/fly-apps/dockerfile-rails) from 1.6.17 to 1.6.19.
- [Release notes](https://github.com/fly-apps/dockerfile-rails/releases)
- [Commits](fly-apps/dockerfile-rails@v1.6.17...v1.6.19)

---
updated-dependencies:
- dependency-name: dockerfile-rails
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -111,7 +111,7 @@ GEM
       reline (>= 0.3.8)
     diff-lcs (1.5.1)
     diffy (3.4.2)
-    dockerfile-rails (1.6.17)
+    dockerfile-rails (1.6.19)
       rails (>= 3.0.0)
     dotenv (3.1.4)
     erubi (1.13.0)
@@ -149,7 +149,7 @@ GEM
       csv
       mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
-    i18n (1.14.5)
+    i18n (1.14.6)
       concurrent-ruby (~> 1.0)
     io-console (0.7.2)
     irb (1.12.0)
@@ -184,13 +184,13 @@ GEM
     marcel (1.0.4)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    minitest (5.25.0)
+    minitest (5.25.1)
     msgpack (1.7.2)
     multi_xml (0.6.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     nenv (0.3.0)
-    net-imap (0.4.14)
+    net-imap (0.4.16)
       date
       net-protocol
     net-pop (0.1.2)
@@ -329,7 +329,7 @@ GEM
     strscan (3.1.0)
     terser (1.2.3)
       execjs (>= 0.3.0, < 3)
-    thor (1.3.1)
+    thor (1.3.2)
     tilt (2.3.0)
     timeout (0.4.1)
     tzinfo (2.0.6)
@@ -346,7 +346,7 @@ GEM
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
-    zeitwerk (2.6.17)
+    zeitwerk (2.6.18)
 
 PLATFORMS
   aarch64-linux