Bump alpine from 3.12.1 to 3.14.0 (#57)

Bumps alpine from 3.12.1 to 3.14.0.

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

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.12.1
+FROM alpine:3.14.0
 
 LABEL maintainer="Adrien Ferrand <ferrand.ad@gmail.com>"