Update and rename Dockerfile to Containerfile

Containerfile

@@ -1,16 +1,11 @@
-# syntax = docker/dockerfile:1
-
 FROM --platform=${BUILDPLATFORM} golang:1.18-bullseye AS build
 WORKDIR .
 ENV CGO_ENABLED=0
-COPY . .
 ARG TARGETOS
 ARG TARGETARCH
 RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o /bin/rawleydotxyz .
 
 FROM scratch AS bin
 COPY --from=build /bin/rawleydotxyz /
-
-FROM golang:1.18-bullseye AS run
 EXPOSE 8080/tcp
 CMD ["/rawleydotxyz"]