fix podman builds

Author: jotak

Dockerfile

@@ -1,12 +1,9 @@
-# We do not use --platform feature to auto fill this ARG because of incompatibility between podman and docker
 ARG TARGETARCH
 FROM docker.io/library/node:18-alpine as web-builder
 
 USER node
 
 ARG BUILDSCRIPT
-ARG TARGETPLATFORM
-ARG TARGETARCH=amd64
 WORKDIR /opt/app-root
 
 COPY --chown=node web/package.json web/package.json
@@ -24,7 +21,6 @@ RUN npm run build$BUILDSCRIPT
 
 FROM docker.io/library/golang:1.22 as go-builder
 
-ARG TARGETPLATFORM
 ARG TARGETARCH=amd64
 ARG LDFLAGS
 WORKDIR /opt/app-root
@@ -38,7 +34,7 @@ COPY pkg/ pkg/
 
 RUN CGO_ENABLED=0 GOARCH=$TARGETARCH go build -ldflags "$LDFLAGS" -mod vendor -o plugin-backend cmd/plugin-backend.go
 
-FROM  --platform=linux/$TARGETARCH registry.access.redhat.com/ubi9/ubi-minimal:9.4
+FROM --platform=linux/$TARGETARCH registry.access.redhat.com/ubi9/ubi-minimal:9.4
 
 COPY --from=web-builder /opt/app-root/web/dist ./web/dist
 COPY --from=go-builder /opt/app-root/plugin-backend ./