Set image versions to major or minor only (#247)

PR removes specificity of base image versions where possible, preferring
to specify only the major or minor version but removing all patch
versions. This should give the image pull the flexibility to pull
slightly updated versions.

cadence/cadence-multiarch.Dockerfile

@@ -1,13 +1,13 @@
 # syntax=docker/dockerfile:1
-FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.20.1-bullseye as builder
+FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.20-bullseye as builder
 ARG TARGETPLATFORM BUILDPLATFORM TARGETOS TARGETARCH
 WORKDIR /cadence
 COPY ./* ./
 RUN go mod download
 RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -ldflags="-w -s" -o /cadence-server
 
 ARG ARCH=
-FROM ${ARCH}golang:1.20.1-alpine
+FROM ${ARCH}golang:1.20-alpine
 LABEL maintainer="Ken Ellorando (kenellorando.com)"
 LABEL source="github.com/kenellorando/cadence"
 COPY --from=builder /cadence/public /cadence/server/public

cadence/cadence.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 ARG ARCH=
-FROM ${ARCH}golang:1.20.1-bullseye
+FROM ${ARCH}golang:1.20-bullseye
 LABEL maintainer="Ken Ellorando (kenellorando.com)"
 LABEL source="github.com/kenellorando/cadence"
 WORKDIR /cadence/server

cadence/icecast2.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 ARG ARCH=
-FROM ${ARCH}alpine:3.17
+FROM ${ARCH}alpine:3
 LABEL maintainer="Ken Ellorando (kenellorando.com)"
 LABEL source="github.com/kenellorando/cadence"
 RUN apk update && apk add icecast=2.4.4-r8

cadence/liquidsoap.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 ARG ARCH=
-FROM ${ARCH}debian:11.6-slim
+FROM ${ARCH}debian:11-slim
 LABEL maintainer="Ken Ellorando (kenellorando.com)"
 LABEL source="github.com/kenellorando/cadence"