feat: docker support (#3)

---------

Co-authored-by: Anton Ovchinnikov <[email protected]>

Dockerfile

@@ -0,0 +1,14 @@
+ARG GOVERSION=latest
+FROM golang:$GOVERSION AS builder
+
+WORKDIR /src
+COPY . .
+
+RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o . -ldflags="-s -w" .
+
+FROM alpine:3
+
+RUN apk add --no-cache ca-certificates tzdata
+COPY ./docker-entrypoint.sh /
+COPY --from=builder /src/sentlog /bin/sentlog
+ENTRYPOINT ["/docker-entrypoint.sh"]

docker-entrypoint.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# For compatibility with older entrypoints
+if [ "${1}" == "sentlog" ]; then
+  shift
+elif [ "${1}" == "sh" ] || [ "${1}" == "/bin/sh" ]; then
+  exec "$@"
+fi
+
+exec /bin/sentlog "$@"