chore(deps): bump alpine from 3.15.4 to 3.16.0 in /.docker (#929)

Bumps alpine from 3.15.4 to 3.16.0.

---
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>

.docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.15.4
+FROM alpine:3.16.0
 
 RUN addgroup -S ory; \
     adduser -S ory -G ory -D  -h /home/ory -s /bin/nologin; \

.docker/Dockerfile-alpine

@@ -1,4 +1,4 @@
-FROM alpine:3.15.4
+FROM alpine:3.16.0
 
 RUN addgroup -S ory; \
     adduser -S ory -G ory -D -H -s /bin/nologin

.docker/Dockerfile-build

@@ -18,7 +18,7 @@ ADD . .
 
 RUN go build -tags sqlite -o /usr/bin/keto .
 
-FROM alpine:3.15.4
+FROM alpine:3.16.0
 
 RUN addgroup -S ory; \
     adduser -S ory -G ory -D  -h /home/ory -s /bin/nologin; \

.docker/Dockerfile-sqlite

@@ -1,4 +1,4 @@
-FROM alpine:3.15.4
+FROM alpine:3.16.0
 
 # Because this image is built for SQLite, we create /home/ory and /home/ory/sqlite which is owned by the ory user
 # and declare /home/ory/sqlite a volume.