chore(docker): support multiple platform

docker/Dockerfile

@@ -0,0 +1,16 @@
+FROM alpine:3.17
+
+ARG TARGETOS
+ARG TARGETARCH
+
+LABEL maintainer="Bo-Yi Wu <appleboy.tw@gmail.com>" \
+  org.label-schema.name="SSH Plugin" \
+  org.label-schema.vendor="Bo-Yi Wu" \
+  org.label-schema.schema-version="1.0"
+
+RUN apk add --no-cache ca-certificates && \
+  rm -rf /var/cache/apk/*
+
+COPY release/${TARGETOS}/${TARGETARCH}/drone-ssh /bin/
+
+ENTRYPOINT ["/bin/drone-ssh"]