Upgraded alpine version (#2391)

cmd/builder/Dockerfile.fission-builder

@@ -1,4 +1,4 @@
-FROM alpine:3.14.3
+FROM alpine:3.15
 RUN apk add --update ca-certificates
 COPY builder /builder
 ENTRYPOINT ["/builder"]

cmd/fetcher/Dockerfile.fission-fetcher

@@ -1,4 +1,4 @@
-FROM alpine:3.14.3
+FROM alpine:3.15
 RUN apk add --update ca-certificates
 COPY fetcher /
 ENTRYPOINT ["/fetcher"]

cmd/fission-bundle/Dockerfile.fission-bundle

@@ -1,4 +1,4 @@
-FROM alpine:3.14.3
+FROM alpine:3.15
 RUN apk add --update ca-certificates
 COPY fission-bundle /
 ENTRYPOINT ["/fission-bundle"]

cmd/preupgradechecks/Dockerfile.fission-preupgradechecks

@@ -1,4 +1,4 @@
-FROM alpine:3.14.3
+FROM alpine:3.15
 RUN apk add --update ca-certificates
 COPY pre-upgrade-checks /
 ENTRYPOINT ["/pre-upgrade-checks"]

cmd/reporter/Dockerfile.reporter

@@ -1,4 +1,4 @@
-FROM alpine:3.14.3
+FROM alpine:3.15
 RUN apk add --update ca-certificates
 COPY reporter /
 ENTRYPOINT ["/reporter"]