fix: Dockerfiles/Dockerfile.ssas to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7895537
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-7895537
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-8235201
- https://snyk.io/vuln/SNYK-ALPINE320-OPENSSL-8235201

Dockerfiles/Dockerfile.ssas

@@ -1,4 +1,4 @@
-FROM golang:1.21.12-alpine3.20 AS documentation
+FROM golang:alpine3.20 AS documentation
 RUN apk update upgrade
 RUN apk add git build-base gcc binutils-gold
 WORKDIR /go/src/github.com/CMSgov/bcda-ssas-app
@@ -13,7 +13,7 @@ RUN dir=$(mktemp -d) && \
 WORKDIR /go/src/github.com/CMSgov/bcda-ssas-app/ssas/service/main
 RUN swagger generate spec -i ../../swaggerui/tags.yml -o ../../swaggerui/swagger.json -m
 
-FROM golang:1.21.12-alpine3.20 AS builder
+FROM golang:alpine3.20 AS builder
 ARG VERSION
 RUN apk update upgrade
 RUN apk add git
@@ -23,7 +23,7 @@ WORKDIR /go/src/github.com/CMSgov/bcda-ssas-app/ssas
 COPY --from=documentation /go/src/github.com/CMSgov/bcda-ssas-app/ssas/swaggerui ./swaggerui
 RUN go build -ldflags "-X github.com/CMSgov/bcda-ssas-app/ssas/constants.Version=$VERSION" -o ssas ./service/main
 
-FROM golang:1.21.12-alpine3.20
+FROM golang:alpine3.20
 RUN apk update upgrade
 RUN apk --no-cache add ca-certificates aws-cli curl
 WORKDIR /go/src/github.com/CMSgov/bcda-ssas-app