Apply best security practices for OpenSSF (#3069)

* [StepSecurity] Apply security best practices
* Keep needed check in precommit

---------

Signed-off-by: StepSecurity Bot <bot@stepsecurity.io>
Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>
Co-authored-by: StepSecurity Bot <bot@stepsecurity.io>

cmd/builder/Dockerfile

@@ -1,3 +1,3 @@
-FROM cgr.dev/chainguard/static:latest
+FROM cgr.dev/chainguard/static:latest@sha256:5ff428f8a48241b93a4174dbbc135a4ffb2381a9e10bdbbc5b9db145645886d5
 COPY builder /builder
 ENTRYPOINT ["/builder"]

cmd/fetcher/Dockerfile

@@ -1,3 +1,3 @@
-FROM cgr.dev/chainguard/static:latest
+FROM cgr.dev/chainguard/static:latest@sha256:5ff428f8a48241b93a4174dbbc135a4ffb2381a9e10bdbbc5b9db145645886d5
 COPY fetcher /
 ENTRYPOINT ["/fetcher"]

cmd/fission-bundle/Dockerfile

@@ -1,3 +1,3 @@
-FROM cgr.dev/chainguard/static:latest
+FROM cgr.dev/chainguard/static:latest@sha256:5ff428f8a48241b93a4174dbbc135a4ffb2381a9e10bdbbc5b9db145645886d5
 COPY fission-bundle /
 ENTRYPOINT ["/fission-bundle"]

cmd/fission-bundle/main.go

@@ -161,7 +161,6 @@ func main() {
 
 Use it to start one or more of the fission servers:
 
-
  Pool manager maintains a pool of generalized function containers, and
  specializes them on-demand. Executor must be run from a pod in a
  Kubernetes cluster.

cmd/preupgradechecks/Dockerfile

@@ -1,3 +1,3 @@
-FROM cgr.dev/chainguard/static:latest
+FROM cgr.dev/chainguard/static:latest@sha256:5ff428f8a48241b93a4174dbbc135a4ffb2381a9e10bdbbc5b9db145645886d5
 COPY pre-upgrade-checks /
 ENTRYPOINT ["/pre-upgrade-checks"]

cmd/reporter/Dockerfile

@@ -1,3 +1,3 @@
-FROM cgr.dev/chainguard/static:latest
+FROM cgr.dev/chainguard/static:latest@sha256:5ff428f8a48241b93a4174dbbc135a4ffb2381a9e10bdbbc5b9db145645886d5
 COPY reporter /
 ENTRYPOINT ["/reporter"]