ci: add Docker image

ViRb3 · ViRb3 · commit 0671f3c6478c · 2021-08-18T22:44:30.000+01:00
diff --git a/Dockerfile b/Dockerfile
@@ -0,0 +1,7 @@
+FROM golang:1.17.0-alpine AS builder
+
+WORKDIR /src
+COPY . .
+
+RUN go mod download && \
+    CGO_ENABLED=0 go build -ldflags="-s -w" -o "ios-signer-builder"
