Move build script to build directory

build/release/Dockerfile-build

@@ -0,0 +1,29 @@
+# Perform a build
+FROM golang:alpine AS build
+EXPOSE 8080 1935
+RUN mkdir /build
+ADD . /build
+WORKDIR /build
+RUN apk update && apk add --no-cache gcc build-base linux-headers
+
+ARG VERSION
+ENV VERSION=${VERSION}
+ARG GIT_COMMIT
+ENV GIT_COMMIT=${GIT_COMMIT}
+ARG NAME
+ENV NAME=${NAME}
+
+RUN CGO_ENABLED=1 GOOS=linux go build -a -installsuffix cgo -ldflags "-extldflags \"-static\" -s -w -X main.GitCommit=$GIT_COMMIT -X main.BuildVersion=$VERSION -X main.BuildType=$NAME" -o owncast .
+
+# Create the image by copying the result of the build into a new alpine image
+FROM alpine
+RUN apk update && apk add --no-cache ffmpeg ffmpeg-libs ca-certificates && update-ca-certificates
+
+# Copy owncast assets
+WORKDIR /app
+COPY --from=build /build/owncast /app/owncast
+COPY --from=build /build/config-example.yaml /app/config.yaml
+COPY --from=build /build/webroot /app/webroot
+COPY --from=build /build/static /app/static
+
+CMD ["/app/owncast"]