Add Dockerfile (#8)

Co-authored-by: fiatjaf_ <fiatjaf@gmail.com>

Dockerfile

@@ -0,0 +1,24 @@
+FROM golang:1.21.2 as builder
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o main .
+
+####
+
+FROM alpine:latest  
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /root/
+
+COPY --from=builder /app/main .
+
+CMD ["./main"] 
+

README.md

@@ -7,4 +7,13 @@ njump has some special features to effectively share notes on platforms that off
 
 njump currently lives under [njump.me](https://njump.me), you can reach it appending a Nostr NIP-19 entity (npub, nevent, nprofile, naddr, etc.) or a NIP-05 address after the domain, e.g. `njump.me/nevent1xxxxxx...xxx` or `njump.me/xxxx@zzzzz.com`
 
-For more information about njump's philosophy and its use, read the presentation [on the homepage](https://njump.me).
+For more information about njump's philosophy and its use, read the presentation [on the homepage](https://njump.me).
+
+Docker
+=====
+
+To build and run in a Docker container:
+```bash
+docker build -t njump .
+docker run -e DOMAIN=njump.mydomain.com -p 2999:2999 njump
+```