musl support

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>

Author: eternal-flame-AD

Dockerfile.linux-amd64-musl

@@ -0,0 +1,15 @@
+ARG GO_VERSION
+FROM gotify/build:$GO_VERSION-linux-amd64
+ARG VCS_REF
+RUN \
+  apt-get update && \
+  apt-get install -y musl-tools
+
+ENV CGO_ENABLED=1
+ENV GOOS=linux
+ENV GOARCH=amd64
+ENV GO_EXTRA_LDFLAGS="-linkmode external -extldflags '-static'"
+ENV CC=musl-gcc
+
+LABEL org.opencontainers.image.source="https://github.com/gotify/build" \
+  org.opencontainers.image.revision=$VCS_REF 

Makefile

@@ -1,4 +1,4 @@
-PROJECT=gotify/build
+PROJECT=docker.io/gotify/build
 GO_VERSION?=$(shell cat GO_VERSION)
 VCS_REF=$(shell git describe --tags --always)
 
@@ -20,6 +20,12 @@ build-linux-amd64:
 push-linux-amd64:
 	docker push ${PROJECT}:${GO_VERSION}-linux-amd64
 
+build-linux-amd64-musl:
+	docker build --build-arg VCS_REF=${VCS_REF} --build-arg GO_VERSION=${GO_VERSION} -t ${PROJECT}:${GO_VERSION}-linux-amd64-musl -f Dockerfile.linux-amd64-musl .
+
+push-linux-amd64-musl:
+	docker push ${PROJECT}:${GO_VERSION}-linux-amd64-musl
+
 build-linux-386:
 	docker build --build-arg VCS_REF=${VCS_REF} --build-arg GO_VERSION=${GO_VERSION} -t ${PROJECT}:${GO_VERSION}-linux-386 -f Dockerfile.linux-386 .