first draft of Dockerfile

Dockerfile

@@ -0,0 +1,38 @@
+FROM golang:1.16.4-alpine3.13 AS builder
+
+# create build dir
+RUN mkdir -p /go/src/github.com/superseriousbusiness/gotosocial
+WORKDIR /go/src/github.com/superseriousbusiness/gotosocial
+
+# move source files
+ADD cmd /go/src/github.com/superseriousbusiness/gotosocial/cmd
+ADD internal /go/src/github.com/superseriousbusiness/gotosocial/internal
+ADD testrig /go/src/github.com/superseriousbusiness/gotosocial/testrig
+ADD go.mod /go/src/github.com/superseriousbusiness/gotosocial/go.mod
+ADD go.sum /go/src/github.com/superseriousbusiness/gotosocial/go.sum
+
+# do the build step
+RUN go build ./cmd/gotosocial
+
+FROM alpine:3.13 AS executor
+RUN apk update && apk upgrade --no-cache
+
+# copy over the binary from the first stage
+RUN mkdir -p /gotosocial/storage
+COPY --from=builder /go/src/github.com/superseriousbusiness/gotosocial/gotosocial /gotosocial/gotosocial
+
+# copy over the web directory with templates etc
+COPY web /gotosocial/web
+
+# make the gotosocial group and user
+RUN addgroup -g 1000 gotosocial
+RUN adduser -HD -u 1000 -G gotosocial gotosocial
+
+# give ownership of the gotosocial dir to the new user
+RUN chown -R gotosocial gotosocial /gotosocial
+
+# become the user
+USER gotosocial
+
+WORKDIR /gotosocial
+ENTRYPOINT [ "/gotosocial/gotosocial", "server", "start" ]