Fix/arm64 docker (#133)

* fix: arm64 docker builds

Don't hardcode amd64 platform for the Wings binary.

* update docker file

don't specify buildplatform
remove upx as it causes arm64 failures
remove goos as the build is on linux hosts.

Co-authored-by: softwarenoob <admin@softwarenoob.com>

Dockerfile

@@ -1,19 +1,18 @@
 # Stage 1 (Build)
-FROM --platform=$BUILDPLATFORM golang:1.17-alpine AS builder
+FROM golang:1.17-alpine AS builder
 
 ARG VERSION
-RUN apk add --update --no-cache git make upx
+RUN apk add --update --no-cache git make
 WORKDIR /app/
 COPY go.mod go.sum /app/
 RUN go mod download
 COPY . /app/
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+RUN CGO_ENABLED=0 go build \
     -ldflags="-s -w -X github.com/pterodactyl/wings/system.Version=$VERSION" \
     -v \
     -trimpath \
     -o wings \
     wings.go
-RUN upx wings
 RUN echo "ID=\"distroless\"" > /etc/os-release
 
 # Stage 2 (Final)