Bump composer from 2.1.0 to 2.2.1

dependabot[bot] · web-flow · commit 08116e4195fa · 2021-12-27T08:01:04.000Z
Bumps composer from 2.1.0 to 2.2.1.

---
updated-dependencies:
- dependency-name: composer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] &lt;support@github.com&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM composer:2.1.0 as builder
+FROM composer:2.2.1 as builder
 
 COPY . /opt/phpdoc
 WORKDIR /opt/phpdoc

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-FROM composer:2.1.0 as builder`
	`1`	`+FROM composer:2.2.1 as builder`
`2`	`2`
`3`	`3`	`COPY . /opt/phpdoc`
`4`	`4`	`WORKDIR /opt/phpdoc`