add dockerfile

.github/workflows/build.yaml

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+name: Github Actions Demo
+run-name: ${{ github.actor }} is testing out GitHub Actions (on Gitea) 🚀
+on: [push]
+
+jobs:
+  Explore-Gitea-Actions:
+    runs-on: metal-docker
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v3
+      - run: |
+          ls -la
+          docker build --progress plain --iidfile iid.txt .
+          stringprefix() { [ ${#1} -le $2 ] && echo $1 && return 0 || stringprefix "${1%?}" $2 ; }
+          SHORTSHA="$(stringprefix "$GITHUB_SHA" 8)"
+          for TAG in "$SHORTSHA" "$GITHUB_REF_NAME";do
+            docker tag "`cat iid.txt`" "$DOCKER_REGISTRY/$GITHUB_REPOSITORY:$TAG"
+            docker push "$DOCKER_REGISTRY/$GITHUB_REPOSITORY:$TAG"
+          done
+

Dockerfile

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+ARG RELEASE=v0.26.0
+ARG ALPINE=3.19
+ARG GOLANG=1.22
+
+FROM golang:${GOLANG}-alpine${ALPINE} AS builder
+ARG RELEASE
+
+RUN apk add --no-cache git
+RUN git clone https://github.com/ipfs/kubo -b "release-$RELEASE"
+WORKDIR kubo
+RUN \
+  for cmd in \
+    ipfs \
+    ipfswatch \
+  ;do (cd cmd/$cmd && go build -o /$cmd);done
+
+FROM alpine:${ALPINE}
+
+COPY --from=builder /ipfs /bin/ipfs
+COPY --from=builder /ipfswatch /bin/ipfswatch
+
+CMD ["ipfs"]