Use multistage docker build

Dockerfile

@@ -1,3 +1,23 @@
-FROM golang:1.21.5@sha256:135ba6c2ae2a9a022f53f3eee24ef213bc62e876811cd9582b91045168206873
+# When updating the version of the base container, please use the 
+# SHA256 of the distribution manifest, not individual images.
 
-COPY scip-go /usr/bin/
+# This ensures that when pulling the container, Docker will detect 
+# the platform and pull the correct image (if it exists)
+
+# For example, to find out the hash of the manfiest, run:
+
+# $ docker buildx imagetools inspect golang:1.21.5-alpine
+# Name:      docker.io/library/golang:1.21.5-alpine
+# MediaType: application/vnd.docker.distribution.manifest.list.v2+json
+# Digest:    sha256:4db4aac30880b978cae5445dd4a706215249ad4f43d28bd7cdf7906e9be8dd6b
+# And use this digest in FROM
+FROM golang:1.21.5@sha256:4db4aac30880b978cae5445dd4a706215249ad4f43d28bd7cdf7906e9be8dd6b
+
+COPY . /sources
+WORKDIR /sources
+RUN go build -o scip-go ./cmd/scip-go
+
+FROM alpine:latest
+
+COPY --from=builder /sources/scip-go /usr/bin/
+CMD ["scip-go"]

README.md

@@ -75,6 +75,14 @@ scip-go
 src code-intel upload -github-token='${{ secrets.GITHUB_TOKEN }}' -no-progress
 ```
 
+## Docker
+
+To build a self-contained Docker container with the indexer, use 
+the following command:
+
+```bash
+docker build -t scip-go:latest .
+```
 
 # Contributing