wip: migrate to mono-repo. SPN has already been moved to spn/

cmds/observation-hub/Dockerfile

@@ -0,0 +1,38 @@
+# Docker Image for Observation Hub
+
+# Important:
+# You need to build this from the repo root!
+# Run: docker build -f cmds/observation-hub/Dockerfile -t safing/observation-hub:latest .
+# Check With: docker run -ti --rm safing/observation-hub:latest --help
+
+# golang 1.21 linux/amd64 on debian bookworm
+# https://github.com/docker-library/golang/blob/master/1.21/bookworm/Dockerfile
+FROM golang:1.21-bookworm as builder
+
+# Ensure ca-certficates are up to date
+RUN update-ca-certificates
+
+# Install dependencies
+WORKDIR $GOPATH/src/github.com/safing/portmaster/spn
+COPY go.mod .
+COPY go.sum .
+ENV GO111MODULE=on
+RUN go mod download
+RUN go mod verify
+
+# Copy source code
+COPY . .
+
+# Build the static binary
+RUN cd cmds/observation-hub && \
+CGO_ENABLED=0 ./build -o /go/bin/observation-hub
+
+# Use static image
+# https://github.com/GoogleContainerTools/distroless
+FROM gcr.io/distroless/static-debian12
+
+# Copy our static executable
+COPY --from=builder --chmod=0755 /go/bin/observation-hub /go/bin/observation-hub
+
+# Run the observation-hub binary.
+ENTRYPOINT ["/go/bin/observation-hub"]